Bryan and Adam have some money in the ratio of 7 : 1
After Bryan spends $160,
the amount that Bryan has becomes is
13 that of Adam's.
- How much does Bryan have at first?
- How much does Adam have?
- How much less does Bryan have than Adam in the end?
|
Bryan |
Adam |
Before |
7 x 3 = 21 u |
1 x 3 = 3 u |
Change |
- $160 |
No change |
After |
1 x 1 = 1 u |
3 x 1 = 3 u |
The amount that Adam has remains unchanged.
Make the amount the same using the LCM of 1 and 3.
LCM of 1 and 3 = 3
Amount that Bryan receives
= 21 u - 1 u
= 20 u
20 u = 160
1 u = 160 ÷ 20 = 8
(a)
Amount that Bryan has at first
= 21 u
= 21 x 8
= $168
(b)
Amount that Adam has
= 3 u
= 3 x 8
= $24
(c)
Amount that Bryan has less than Adam in the end
= 3 u - 1 u
= 2 u
= 2 x 8
= $16
Answer(s): (a) $168; (b) $24; (c) $16