PSLE Linda spent $600 in May. This amount was a 20% increase from what she spent in April. The amount she spent in June was a 15% decrease 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 |
+ 20% |
|
May |
120% |
100 u |
Change |
|
- 15 u |
June |
|
85 u |
(a)
Spending in April = 100%
Spending in May = 100% + 20% = 120%
120% = 600
1% = 600 ÷ 120 = 5
Spending in April
= 100%
= 100 x 5
= $500
Spending in May = 100 u
Spending in June = 100 u - 15 u = 85 u
100 u = 600
1 u = 600 ÷ 100 = 6
Spending in June
= 85 u
= 85 x 6
= $510
Total spending from April to June
= 500 + 600 + 510
= $1610
(b)
Increase in spending in June compared to April
= 510 - 500
= $10
Percentage increase
=
Increase in spendingSpending in April x 100%
=
10500 x 100%
= 2%
Answer(s): (a) $1610; (b) 2%