Fill in the blanks.
Adam receives some allowance.
If he increases his savings by 20%,
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 1 = 10 u |
If change |
+ 1 x 7 = + 7 u |
- 7 x 1 = - 7 u |
After |
6 x 7 = 42 u |
3 x 1 = 3 u |
(a)
Change percentage into units.
20% of savings = 70% of spending
15 of savings =
710 of spending
Make the numerators the same.
LCM of 1 and 7 = 7
1 x 75 x 7 of savings =
7 x 110 x 1 of spending
735 of savings =
710 of spending
Amount of savings = 35 u
(b)
Amount of spending = 10 u
(c)
Total amount of allowance
= 35 u + 10 u
= 45 u
(d)
Difference in the amount of savings and spending
= 35 u - 10 u
= 25 u
Answer(s): (a) 35; (b) 10; (c) 45; (d) 25