Change ratio into units.
Fill in the blanks in numbers, units or unit equations.
Bryan and Adam share a sum of money in the ratio 2 : 7.
After Bryan gives
79 of his money to Adam,
Adam has $73 more than Bryan.
- Difference in the amount between Bryan and Adam at first = _____ u
- Amount that Adam has in the end = _____ u
- Total amount that they have = _____ u
- 1 u = $_____
|
Bryan |
Adam |
Comparing between Bryan and Adam at first |
2 x 9 = 18 u |
7 x 9 = 63 u |
Before |
9 x 2 = 18 u |
|
Change |
7 x 2 = - 14 u |
+ 14 u |
After |
2 x 2 = 4 u |
77 u |
(a)
Change ratio into units.
The amount that Bryan has at first is repeated.
Amount that Bryan has at first = 18 u
Amount that Adam has at first = 63 u
Difference in the amount between Bryan and Adam at first
= 63 u - 18 u
= 45 u
(b)
Amount that Adam has in the end
= 63 u + 14 u
= 77 u
(c)
Total amount that they have
= 18 u + 63 u
= 81 u
(d)
Difference in the amount that they have in the end
= 77 u - 4 u
= 73 u
73 u = 73
1 u = 73 ÷ 73 = 1
Answer(s): (a) 45; (b) 77; (c) 81; (d) 1