Maths homework please help !

work out the equivalent percentages and decimals of these fractions.
9/25,13/50,3/10,13/20,5/8

To solve for a percentage, you equate the fraction to something over 100. For the first:

9/25 = x/100

Cross multiply:

25x = 900

Divide by 25:

x = 36

So, 9/25 = 36%

Now, to get this to be in decimal, you literally right out what it means:

0.36, or "36 one-hundredths"

Repeating this process for the rest gives:

13/50 = 26% = 0.26

3/10 = 30% = 0.3

13/20 = 65% = 0.65

5/8 = 62.5% = 0.625