In a box, 50% of the buttons are silver, 20% are pink and the rest are grey
- What fraction of the buttons is grey? Give your answer in the simplest form.
- There are 579 grey buttons in the box. How many buttons are there in the box altogether?
(a)
Percentage of buttons that are grey
= 100% - 50% - 20%
= 30%
Fraction of buttons that are grey
=
30100 =
310 (b)
Number of grey buttons = 3 u
3 u = 579
1 u = 579 ÷ 3 = 193
Total number of buttons
= 10 u
= 10 x 193
= 1930
Answer(s): (a)
310; (b) 1930