In a box, 50% of the marbles are yellow, 18% are red and the rest are black
- What fraction of the marbles is black? Give your answer in the simplest form.
- There are 592 black marbles in the box. How many marbles are there in the box altogether?
(a)
Percentage of marbles that are black
= 100% - 50% - 18%
= 32%
Fraction of marbles that are black
=
32100 =
825 (b)
Number of black marbles = 8 u
8 u = 592
1 u = 592 ÷ 8 = 74
Total number of marbles
= 25 u
= 25 x 74
= 1850
Answer(s): (a)
825; (b) 1850