Fill in the blanks.
Adam receives some allowance.
If he increases his savings by 20%,
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 1 = 10 u |
If change |
+ 1 x 9 = + 9 u |
- 9 x 1 = - 9 u |
After |
6 x 9 = 54 u |
1 x 1 = 1 u |
(a)
Change percentage into units.
20% of savings = 90% of spending
15 of savings =
910 of spending
Make the numerators the same.
LCM of 1 and 9 = 9
1 x 95 x 9 of savings =
9 x 110 x 1 of spending
945 of savings =
910 of spending
Amount of savings = 45 u
(b)
Amount of spending = 10 u
(c)
Total amount of allowance
= 45 u + 10 u
= 55 u
(d)
Difference in the amount of savings and spending
= 45 u - 10 u
= 35 u
Answer(s): (a) 45; (b) 10; (c) 55; (d) 35