In a box, 40% of the marbles are black, 18% are purple and the rest are brown
- What fraction of the marbles is brown? Give your answer in the simplest form.
- There are 462 brown marbles in the box. How many marbles are there in the box altogether?
(a)
Percentage of marbles that are brown
= 100% - 40% - 18%
= 42%
Fraction of marbles that are brown
=
42100 =
2150 (b)
Number of brown marbles = 21 u
21 u = 462
1 u = 462 ÷ 21 = 22
Total number of marbles
= 50 u
= 50 x 22
= 1100
Answer(s): (a)
2150; (b) 1100