Michael had some apricot wafers and cheese wafers. He gave away 80 wafers to his sister. 10% of them were apricot wafers and the rest were cheese wafers.
- How many cheese wafers did he give his sister?
- Michael gave some apricot wafers to his cousin. 47 of all the wafers he gave away to his sister and his cousin were apricot wafers. How many apricot wafers did he give his cousin?
(a)
Percentage of cheese wafers
= 100% - 10%
= 90%
Number of cheese wafers that Michael gave to his sister
= 90% x 80
=
90100 x 80
= 72
(b)
Fraction of all the wafers he gave away to his sister and his cousin that were cheese wafers
= 1 -
47=
373 u = 72
1 u = 72 ÷ 3 = 24
Number of apricot wafers that Michael gave to his sister and his cousin
= 4 u
= 4 x 24
= 96
Number of apricot wafers that Michael gave to his sister
= 80 - 72
= 8
Number of apricot wafers that Michael gave to his cousin
= 96 - 8
= 88
Answer(s): (a) 72; (b) 88