Math Trivia Quiz: Can You Pass This Percent Equations Test?

1) Determine what is the correct demonstration of percent equation for the following situation: Molly had how many Legos in her box if it was 88% of 300.

Molly had 88% of 300 Legos in her box.

Explanation

Molly had 88% of 300 Legos in her box.

2) 40% of what number is 82?

206

210

310

205

To find 40% of a number, we can multiply the number by 0.4. So, if we let the number be x, we have the equation 0.4x = 82. Dividing both sides by 0.4, we find that x = 205. Therefore, 40% of 205 is 82.

Explanation

To find 40% of a number, we can multiply the number by 0.4. So, if we let the number be x, we have the equation 0.4x = 82. Dividing both sides by 0.4, we find that x = 205. Therefore, 40% of 205 is 82.

3) Using percent Proportion, check all the ways this problem can best be represented. What number is 25% of 180?

To find what number is 25% of 180, we can set up a proportion using the percent proportion formula. The formula states that the part over the whole is equal to the percent over 100. In this case, the part is the unknown number we are trying to find, the whole is 180, and the percent is 25. Setting up the proportion, we get x/180 = 25/100. Cross-multiplying, we get 100x = 180 * 25. Solving for x, we find that x = 45. Therefore, 45 is 25% of 180.

Explanation

To find what number is 25% of 180, we can set up a proportion using the percent proportion formula. The formula states that the part over the whole is equal to the percent over 100. In this case, the part is the unknown number we are trying to find, the whole is 180, and the percent is 25. Setting up the proportion, we get x/180 = 25/100. Cross-multiplying, we get 100x = 180 * 25. Solving for x, we find that x = 45. Therefore, 45 is 25% of 180.

4) What number is 40% of 82. Check all the processes that can be used to determine the answer.

.40 multiplied by 82

To find 40% of 82, you can multiply 0.40 (which is the decimal equivalent of 40%) by 82. This will give you the answer.

Explanation

To find 40% of 82, you can multiply 0.40 (which is the decimal equivalent of 40%) by 82. This will give you the answer.

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5) Check the following that could be applied to percent estimation for the following problem: 27% of 125

Percent estimation involves approximating the value of a percentage without the need for precise calculations. In this case, to estimate 27% of 125, one could round 27% to 25% and calculate 25% of 125, which is 31.25. Since 27% is slightly higher than 25%, the estimated value would be slightly higher than 31.25. Therefore, the answer is 31.

Explanation

Percent estimation involves approximating the value of a percentage without the need for precise calculations. In this case, to estimate 27% of 125, one could round 27% to 25% and calculate 25% of 125, which is 31.25. Since 27% is slightly higher than 25%, the estimated value would be slightly higher than 31.25. Therefore, the answer is 31.

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6) A cell phone survey found 75% of the age 18-25 gave up their home phone and only use a cell phone. If 4, 264 people only use a cell phone, about how many people were surveyed? Determine the best option(s) you would use to determine the answer.

Percent Estimation

Percent of a number

Percent Equation

Percent Proportions

The correct answer is "Percent Estimation" because in this question, we are given the percentage of people in a certain age group who gave up their home phone and only use a cell phone. We are also given the actual number of people who only use a cell phone. To determine the total number of people surveyed, we can use percent estimation by estimating the percentage of the total population represented by the given number of people who only use a cell phone.

Explanation

The correct answer is "Percent Estimation" because in this question, we are given the percentage of people in a certain age group who gave up their home phone and only use a cell phone. We are also given the actual number of people who only use a cell phone. To determine the total number of people surveyed, we can use percent estimation by estimating the percentage of the total population represented by the given number of people who only use a cell phone.