Cole had some chocolate chip puffs and cherry puffs. He gave away 85 puffs to his brother. 20% of them were chocolate chip puffs and the rest were cherry puffs.

1. How many cherry puffs did he give his brother?
2. Cole gave some chocolate chip puffs to his cousin. ³₅ of all the puffs he gave away to his brother and his cousin were chocolate chip puffs. How many chocolate chip puffs did he give his cousin?

(a)
Percentage of cherry puffs
= 100% - 20%
= 80%

Number of cherry puffs that Cole gave to his brother
= 80% x 85
= ⁸⁰₁₀₀ x 85
= 68 

(b)
Fraction of all the puffs he gave away to his brother and his cousin that were cherry puffs
= 1 - ³₅
= ²₅

2 u = 68

1 u = 68 ÷ 2 = 34

Number of chocolate chip puffs that Cole gave to his brother and his cousin
= 3 u
= 3 x 34
= 102

Number of chocolate chip puffs that Cole gave to his brother
= 85 - 68
= 17

Number of chocolate chip puffs that Cole gave to his cousin
= 102 - 17
= 85

Answer(s): (a) 68; (b) 85