Fill in the blanks.
Adam receives some allowance.
If he increases his spending by 70%,
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 7 = 35 u |
If change |
+ 7 x 4 = + 28 u |
- 4 x 7 = - 28 u |
After |
17 x 4 = 68 u |
1 x 7 = 7 u |
(a)
Change percentage into units.
70% of spending = 80% of savings
710 of spending =
45 of savings
Make the numerators the same.
LCM of 7 and 4 = 28
7 x 410 x 4 of spending =
4 x 75 x 7 of savings
2840 of spending =
2835 of savings
Amount of spending = 40 u
(b)
Amount of savings = 35 u
(c)
Total amount of allowance
= 40 u + 35 u
= 75 u
(d)
Difference in the amount of spending and savings
= 40 u - 35 u
= 5 u
Answer(s): (a) 40; (b) 35; (c) 75; (d) 5