Fill in the blanks.
Adam receives some allowance.
If he increases his spending by 10%,
his savings decreases by 30%.
- 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 3 = 30 u |
10 x 1 = 10 u |
If change |
+ 1 x 3 = + 3 u |
- 3 x 1 = - 3 u |
After |
11 x 3 = 33 u |
7 x 1 = 7 u |
(a)
Change percentage into units.
10% of spending = 30% of savings
110 of spending =
310 of savings
Make the numerators the same.
LCM of 1 and 3 = 3
1 x 310 x 3 of spending =
3 x 110 x 1 of savings
330 of spending =
310 of savings
Amount of spending = 30 u
(b)
Amount of savings = 10 u
(c)
Total amount of allowance
= 30 u + 10 u
= 40 u
(d)
Difference in the amount of spending and savings
= 30 u - 10 u
= 20 u
Answer(s): (a) 30; (b) 10; (c) 40; (d) 20