In a box, 30% of the cards are white, 14% are pink and the rest are black
- What fraction of the cards is black? Give your answer in the simplest form.
- There are 420 black cards in the box. How many cards are there in the box altogether?
(a)
Percentage of cards that are black
= 100% - 30% - 14%
= 56%
Fraction of cards that are black
=
56100 =
1425 (b)
Number of black cards = 14 u
14 u = 420
1 u = 420 ÷ 14 = 30
Total number of cards
= 25 u
= 25 x 30
= 750
Answer(s): (a)
1425; (b) 750