Question

9/20 written as a decimal and percent

Answer 1

As a decimal it is .45 and the percent is 45%

Answer 2

Explanation: To write a fraction as a percent, first remember that a percent is a ratio of a number to 100. If we want to write 9/20 as a percent, wee need to find a fraction equivalent to 9/20 with a 100 in the denominator. We can do this by setting up a proportion.

Let's use "W" as our variable.

`(9)/(20)` =
`(w)/(100)`

We can use cross product to find the missing value.

20w = 900

÷20 ÷20

W = 45

Therefore, 9/20 can be written as 45%.

If we want to write 9/20 as a decimal, we need to find a fraction that is equivalent to 9/20 with a 100 in the denominator. Notice that if we multiply the numerator and the denominator of 9/20 by 5, we get the equivalent fraction 45/100 which we can no write as a decimal. Remember that the hundredths place is two places to the right of the decimal point. Therefore, we can write 45/100 as 0.45.