Fill in the blanks.
Adam receives some allowance.
If he increases his spending by 10%,
his savings decreases by 70%.
- 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 7 = 70 u |
10 x 1 = 10 u |
If change |
+ 1 x 7 = + 7 u |
- 7 x 1 = - 7 u |
After |
11 x 7 = 77 u |
3 x 1 = 3 u |
(a)
Change percentage into units.
10% of spending = 70% of savings
110 of spending =
710 of savings
Make the numerators the same.
LCM of 1 and 7 = 7
1 x 710 x 7 of spending =
7 x 110 x 1 of savings
770 of spending =
710 of savings
Amount of spending = 70 u
(b)
Amount of savings = 10 u
(c)
Total amount of allowance
= 70 u + 10 u
= 80 u
(d)
Difference in the amount of spending and savings
= 70 u - 10 u
= 60 u
Answer(s): (a) 70; (b) 10; (c) 80; (d) 60