In a box, 39% of the coins are grey, 17% are brown and the rest are black
- What fraction of the coins is black? Give your answer in the simplest form.
- There are 660 black coins in the box. How many coins are there in the box altogether?
(a)
Percentage of coins that are black
= 100% - 39% - 17%
= 44%
Fraction of coins that are black
=
44100 =
1125 (b)
Number of black coins = 11 u
11 u = 660
1 u = 660 ÷ 11 = 60
Total number of coins
= 25 u
= 25 x 60
= 1500
Answer(s): (a)
1125; (b) 1500