Ian had some apple biscuits and strawberry biscuits. He gave away 175 biscuits to his brother. 20% of them were apple biscuits and the rest were strawberry biscuits.

1. How many strawberry biscuits did he give his brother?
2. Ian gave some apple biscuits to his cousin. ²₇ of all the biscuits he gave away to his brother and his cousin were apple biscuits. How many apple biscuits did he give his cousin?

(a)
Percentage of strawberry biscuits
= 100% - 20%
= 80%

Number of strawberry biscuits that Ian gave to his brother
= 80% x 175
= ⁸⁰₁₀₀ x 175
= 140 

(b)
Fraction of all the biscuits he gave away to his brother and his cousin that were strawberry biscuits
= 1 - ²₇
= ⁵₇

5 u = 140

1 u = 140 ÷ 5 = 28

Number of apple biscuits that Ian gave to his brother and his cousin
= 2 u
= 2 x 28
= 56

Number of apple biscuits that Ian gave to his brother
= 175 - 140
= 35

Number of apple biscuits that Ian gave to his cousin
= 56 - 35
= 21

Answer(s): (a) 140; (b) 21