Fill in the blanks.
The ratio of Adam's stickers to Bryan's stickers is 4 : 7.
After Adam gives 80 stickers away,
The ratio of Adam's stickers to Bryan's stickers becomes 4 : 9.
- Whose number of stickers has not 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 = _____
|
Adam |
Bryan |
Before |
4 x 9 = 36 u |
7 x 9 = 63 u |
Change |
- 80 |
|
After |
4 x 7 = 28 u |
9 x 7 = 63 u |
(a)
Change ratio into units.
The number of stickers that Bryan (2) has remains unchanged.
(b)
LCM of 7 and 9 = 63
Number of stickers that Bryan has = 63 u
(c)
Change in the number of stickers that Adam has
= 36 u - 28 u
= 8 u
(d)
Number of stickers that Adam gives away = 80
8 u = 80
1 u = 80 ÷ 8 = 10
Answer(s): (a) 2; (b) 63; (c) 8; (d) 10