PSLE Linda spent $945 in May. This amount was a 5% increase from what she spent in April. The amount she spent in June was a 20% decrease from what she spent in May.
- What was the total amount that Linda spent from April to June?
- What was the percentage decrease in the amount Linda spent in June compared to April?
|
Spending |
April |
100% |
|
Change |
+ 5% |
|
May |
105% |
100 u |
Change |
|
- 20 u |
June |
|
80 u |
(a)
Spending in April = 100%
Spending in May = 100% + 5% = 105%
105% = 945
1% = 945 ÷ 105 = 9
Spending in April
= 100%
= 100 x 9
= $900
Spending in May = 100 u
Spending in June = 100 u - 20 u = 80 u
100 u = 945
1 u = 945 ÷ 100 = 9.45
Spending in June
= 80 u
= 80 x 9.45
= $756
Total spending from April to June
= 900 + 945 + 756
= $2601
(b)
Decrease in spending in June compared to April
= 900 - 756
= $144
Percentage decrease
=
Decrease in spendingSpending in April x 100%
=
144900 x 100%
= 16%
Answer(s): (a) $2601; (b) 16%