Fill in the blanks.
The ratio of Bryan's stickers to Adam's stickers is 7 : 5.
After Adam gives 90 stickers away,
The ratio of Bryan's stickers to Adam's stickers becomes 8 : 5.
- Whose number of stickers has changed? Give the answer in number. (Eg Adam = 1; Bryan = 2)
- Number of stickers that Bryan has = _____ u
- Change in the number of stickers that Adam has = _____ u
- 1 u = _____
|
Bryan |
Adam |
Before |
7 x 8 = 56 u |
5 x 8 = 40 u |
Change |
|
- 90 |
After |
8 x 7 = 56 u |
5 x 7 = 35 u |
(a)
Change ratio into units.
The number of stickers that Adam (1) has remains unchanged.
(b)
LCM of 7 and 8 = 56
Number of stickers that Bryan has = 56 u
(c)
Change in the number of stickers that Adam has
= 40 u - 35 u
= 5 u
(d)
Number of stickers that Adam gives away = 90
5 u = 90
1 u = 90 ÷ 5 = 18
Answer(s): (a) 1; (b) 56; (c) 5; (d) 18