Fill in the blanks.
Adam receives some allowance.
If he increases his spending by 50%,
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 |
2 x 7 = 14 u |
10 x 1 = 10 u |
If change |
+ 1 x 7 = + 7 u |
- 7 x 1 = - 7 u |
After |
3 x 7 = 21 u |
3 x 1 = 3 u |
(a)
Change percentage into units.
50% of spending = 70% of savings
12 of spending =
710 of savings
Make the numerators the same.
LCM of 1 and 7 = 7
1 x 72 x 7 of spending =
7 x 110 x 1 of savings
714 of spending =
710 of savings
Amount of spending = 14 u
(b)
Amount of savings = 10 u
(c)
Total amount of allowance
= 14 u + 10 u
= 24 u
(d)
Difference in the amount of spending and savings
= 14 u - 10 u
= 4 u
Answer(s): (a) 14; (b) 10; (c) 24; (d) 4