# Find the number if 12.5% is 7.5. What percentage is the number 24 of the number 129.

July 28, 2021 | education

| 1. Let’s represent the original number as x, then we get the proportion:

x = 100%,

7.5 = 12.5%.

Now let’s use the “cross” rule and get an equation of the form:

2.5x = 7.5 * 100,

2.5x = 750.

Divide 750 by 2.5 and get x value:

x = 750 / 2.5,

x = 300.

Answer: the unknown number is 300.

2. First, define 1% of 129, dividing it into 100 parts:

129/100 = 1.29.

Now you need to divide the number 12 by 1.29, then we find out how many percent is the number 24 of 129:

24 / 1.29 = 18.26 / 43%.

Answer: the number 24 is 18/26/43% of the number 129.