Fill in the blanks.
Adam receives some allowance.
If he increases his savings by 40%,
his spending decreases by 70%.
- Amount of savings = _____ u
- Amount of spending = _____ u
- Total amount of allowance = _____ u
- Difference in the amount of savings and spending = _____ u
|
Savings |
Spending |
Before |
5 x 7 = 35 u |
10 x 2 = 20 u |
If change |
+ 2 x 7 = + 14 u |
- 7 x 2 = - 14 u |
After |
7 x 7 = 49 u |
3 x 2 = 6 u |
(a)
Change percentage into units.
40% of savings = 70% of spending
25 of savings =
710 of spending
Make the numerators the same.
LCM of 2 and 7 = 14
2 x 75 x 7 of savings =
7 x 210 x 2 of spending
1435 of savings =
1420 of spending
Amount of savings = 35 u
(b)
Amount of spending = 20 u
(c)
Total amount of allowance
= 35 u + 20 u
= 55 u
(d)
Difference in the amount of savings and spending
= 35 u - 20 u
= 15 u
Answer(s): (a) 35; (b) 20; (c) 55; (d) 15