In a box, 40% of the marbles are black, 18% are purple and the rest are grey
- What fraction of the marbles is grey? Give your answer in the simplest form.
- There are 441 grey marbles in the box. How many marbles are there in the box altogether?
(a)
Percentage of marbles that are grey
= 100% - 40% - 18%
= 42%
Fraction of marbles that are grey
=
42100 =
2150 (b)
Number of grey marbles = 21 u
21 u = 441
1 u = 441 ÷ 21 = 21
Total number of marbles
= 50 u
= 50 x 21
= 1050
Answer(s): (a)
2150; (b) 1050