128 is what percent of 640?
3.4 is what percent of 5?
15 is what percent of 120?
Divide 128 by 640 and you get 0.2. More the decimal point two places to the right to get the percent.
120 is 20% of 640.
Now that you see how to figure this type of problem, you can do the other two. If you post your answers, we'll be glad to check them.
To find what percent one number is of another number, follow these steps:
1. Divide the first number by the second number.
2. Multiply the result by 100.
Let's apply this method to the given questions:
1. 128 is what percent of 640?
Divide 128 by 640: 128 ÷ 640 = 0.2
Multiply the result by 100: 0.2 × 100 = 20
Therefore, 128 is 20% of 640.
2. 3.4 is what percent of 5?
Divide 3.4 by 5: 3.4 ÷ 5 = 0.68
Multiply the result by 100: 0.68 × 100 = 68
Therefore, 3.4 is 68% of 5.
3. 15 is what percent of 120?
Divide 15 by 120: 15 ÷ 120 = 0.125
Multiply the result by 100: 0.125 × 100 = 12.5
Therefore, 15 is 12.5% of 120.