PSLE Linda spent $680 in May. This amount was a 15% decrease from what she spent in April. The amount she spent in June was a 20% increase from what she spent in May.
- What was the total amount that Linda spent from April to June?
- What was the percentage increase in the amount Linda spent in June compared to April?
|
Spending |
April |
100% |
|
Change |
- 15% |
|
May |
85% |
100 u |
Change |
|
+ 20 u |
June |
|
120 u |
(a)
Spending in April = 100%
Spending in May = 100% - 15% = 85%
85% = 680
1% = 680 ÷ 85 = 8
Spending in April
= 100%
= 100 x 8
= $800
Spending in May = 100 u
Spending in June = 100 u + 20 u = 120 u
100 u = 680
1 u = 680 ÷ 100 = 6.8
Spending in June
= 120 u
= 120 x 6.8
= $816
Total spending from April to June
= 800 + 680 + 816
= $2296
(b)
Increase in spending in June compared to April
= 816 - 800
= $16
Percentage increase
=
Increase in spendingSpending in April x 100%
=
16800 x 100%
= 2%
Answer(s): (a) $2296; (b) 2%