Fill in the blanks.
Adam receives some allowance.
If he increases his spending by 30%,
his savings decreases by 80%.
- 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 |
10 x 4 = 40 u |
5 x 3 = 15 u |
If change |
+ 3 x 4 = + 12 u |
- 4 x 3 = - 12 u |
After |
13 x 4 = 52 u |
1 x 3 = 3 u |
(a)
Change percentage into units.
30% of spending = 80% of savings
310 of spending =
45 of savings
Make the numerators the same.
LCM of 3 and 4 = 12
3 x 410 x 4 of spending =
4 x 35 x 3 of savings
1240 of spending =
1215 of savings
Amount of spending = 40 u
(b)
Amount of savings = 15 u
(c)
Total amount of allowance
= 40 u + 15 u
= 55 u
(d)
Difference in the amount of spending and savings
= 40 u - 15 u
= 25 u
Answer(s): (a) 40; (b) 15; (c) 55; (d) 25