Fill in the blanks.
Adam receives some allowance.
If he increases his savings by 80%,
his spending decreases by 90%.
- 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 9 = 45 u |
10 x 4 = 40 u |
If change |
+ 4 x 9 = + 36 u |
- 9 x 4 = - 36 u |
After |
9 x 9 = 81 u |
1 x 4 = 4 u |
(a)
Change percentage into units.
80% of savings = 90% of spending
45 of savings =
910 of spending
Make the numerators the same.
LCM of 4 and 9 = 36
4 x 95 x 9 of savings =
9 x 410 x 4 of spending
3645 of savings =
3640 of spending
Amount of savings = 45 u
(b)
Amount of spending = 40 u
(c)
Total amount of allowance
= 45 u + 40 u
= 85 u
(d)
Difference in the amount of savings and spending
= 45 u - 40 u
= 5 u
Answer(s): (a) 45; (b) 40; (c) 85; (d) 5