Question

How do you write 3/40 as a percentage?

Answer 1

`7.5%`

Explanation:

First of all, you have to represent this rational number as a decimal fraction.
Dividing `3` by `40`, you get `0.075`.

The percentage is just 100 times greater than decimal presentation, so it will be
`0.075xx100%=7.5%`

Or use the decimal as a fraction with a power of 10 as the denominator.

`0.075 = 75/1000 (div10)/(div10) = 7.5/100 = 7.5%`

Answer 2

.`7.5/100 = 7.5%`

Explanation:

To write a fraction as a percentage the easiest method is if we can change the denominator to 100.

`3/40 xx2.5/2.5 = 7.5/100 = 7.5%`

In many cases that method does not work,
so we can also do this by `xx 100%`

`3/40 xx 100%`

=`7.5%`