Fred had some vanilla scones and cheese scones. He gave away 70 scones to his sister. 40% of them were vanilla scones and the rest were cheese scones.
- How many cheese scones did he give his sister?
- Fred gave some vanilla scones to his cousin. 57 of all the scones he gave away to his sister and his cousin were vanilla scones. How many vanilla scones did he give his cousin?
(a)
Percentage of cheese scones
= 100% - 40%
= 60%
Number of cheese scones that Fred gave to his sister
= 60% x 70
=
60100 x 70
= 42
(b)
Fraction of all the scones he gave away to his sister and his cousin that were cheese scones
= 1 -
57=
272 u = 42
1 u = 42 ÷ 2 = 21
Number of vanilla scones that Fred gave to his sister and his cousin
= 5 u
= 5 x 21
= 105
Number of vanilla scones that Fred gave to his sister
= 70 - 42
= 28
Number of vanilla scones that Fred gave to his cousin
= 105 - 28
= 77
Answer(s): (a) 42; (b) 77