Peter had some apple wafers and cherry wafers. He gave away 120 wafers to his brother. 25% of them were apple wafers and the rest were cherry wafers.
- How many cherry wafers did he give his brother?
- Peter gave some apple wafers to his sister. 27 of all the wafers he gave away to his brother and his sister were apple wafers. How many apple wafers did he give his sister?
(a)
Percentage of cherry wafers
= 100% - 25%
= 75%
Number of cherry wafers that Peter gave to his brother
= 75% x 120
=
75100 x 120
= 90
(b)
Fraction of all the wafers he gave away to his brother and his sister that were cherry wafers
= 1 -
27=
575 u = 90
1 u = 90 ÷ 5 = 18
Number of apple wafers that Peter gave to his brother and his sister
= 2 u
= 2 x 18
= 36
Number of apple wafers that Peter gave to his brother
= 120 - 90
= 30
Number of apple wafers that Peter gave to his sister
= 36 - 30
= 6
Answer(s): (a) 90; (b) 6