Fill in the blanks.
Adam receives some allowance.
If he increases his savings by 60%,
his spending decreases by 80%.
- Amount of savings = _____ u
- Amount of spending = _____ u
- Total amount of allowance = _____ u
- Difference in the amount of savings and spending = _____ u
|
Savings |
Spending |
Before |
5 x 4 = 20 u |
5 x 3 = 15 u |
If change |
+ 3 x 4 = + 12 u |
- 4 x 3 = - 12 u |
After |
8 x 4 = 32 u |
1 x 3 = 3 u |
(a)
Change percentage into units.
60% of savings = 80% of spending
35 of savings =
45 of spending
Make the numerators the same.
LCM of 3 and 4 = 12
3 x 45 x 4 of savings =
4 x 35 x 3 of spending
1220 of savings =
1215 of spending
Amount of savings = 20 u
(b)
Amount of spending = 15 u
(c)
Total amount of allowance
= 20 u + 15 u
= 35 u
(d)
Difference in the amount of savings and spending
= 20 u - 15 u
= 5 u
Answer(s): (a) 20; (b) 15; (c) 35; (d) 5