Question

practical math cp
12.) 32% of 74 is what?

13.) 76 is 33% of what?

14.) 21% of what is 47?

15.) 75% of what is 75?

Explanation:

Question 12: 32% of 74 is what?

Step 1: Convert percentage to decimal

To find a percentage of a number, we first convert the percentage to a decimal by dividing by 100. So, 32% becomes \( \frac{32}{100} = 0.32 \).

Step 2: Multiply the decimal by the number

Now, we multiply this decimal by 74. So, \( 0.32 \times 74 \).
Calculating this: \( 0.32\times74 = 23.68 \)

Step 1: Convert percentage to decimal

First, convert 33% to a decimal. \( 33\%=\frac{33}{100} = 0.33 \)

Step 2: Let the unknown number be \( x \)

We know that \( 0.33\times x=76 \). To find \( x \), we divide both sides of the equation by 0.33. So, \( x=\frac{76}{0.33}\approx230.30 \) (rounded to two decimal places)

Step 1: Convert percentage to decimal

Convert 21% to a decimal: \( 21\%=\frac{21}{100}=0.21 \)

Step 2: Let the unknown number be \( x \)

We have the equation \( 0.21\times x = 47 \). Solve for \( x \) by dividing both sides by 0.21. So, \( x=\frac{47}{0.21}\approx223.81 \) (rounded to two decimal places)

Answer:

23.68

Question 13: 76 is 33% of what?