Fill in the blanks.
Adam receives some allowance.
If he increases his spending by 40%,
his savings decreases by 90%.
- Amount of spending = _____ u
- Amount of savings = _____ u
- Total amount of allowance = _____ u
- Difference in the amount of spending and savings = _____ u
|
Spending |
Savings |
Before |
5 x 9 = 45 u |
10 x 2 = 20 u |
If change |
+ 2 x 9 = + 18 u |
- 9 x 2 = - 18 u |
After |
7 x 9 = 63 u |
1 x 2 = 2 u |
(a)
Change percentage into units.
40% of spending = 90% of savings
25 of spending =
910 of savings
Make the numerators the same.
LCM of 2 and 9 = 18
2 x 95 x 9 of spending =
9 x 210 x 2 of savings
1845 of spending =
1820 of savings
Amount of spending = 45 u
(b)
Amount of savings = 20 u
(c)
Total amount of allowance
= 45 u + 20 u
= 65 u
(d)
Difference in the amount of spending and savings
= 45 u - 20 u
= 25 u
Answer(s): (a) 45; (b) 20; (c) 65; (d) 25