Question

Ava bought a 250-ml bottle of concentrated

Answer 1

Answer:

Ava needs to add 50ml of cleaner.

Step-by-step explanation:

Ratio of cleaner : water = 1:7

This means that the total ratio;(water+cleaner) = 1+7 = 8

Find fraction of each item out of the total ratio of 8;

Fraction of water = $\frac{7}{8}$

Fraction of cleaner = $\frac{1}{8}$

Knowing the fractions, find the quantity of cleaner in ml out of a total of 400-ml;

Cleaner = (1/8 )*400 = 50ml

Therefore, Ava needs to add 50ml of cleaner.