Question

The ratio of Maths and science books in a school library is 4:5. If the number of science books is 75, find the number of Maths books?

Pls help me​

Answer 1

let ratio 4:5 be 4x& 5x

according to the question

5x=75

x=75/5=15

the number of Maths books=4x=4×5=20 is your answer