PSLE Linda saved $480 in May. This amount was a 20% decrease from what she saved in April. The amount she saved in June was a 20% increase from what she saved in May.
- What was the total amount that Linda saved from April to June?
- What was the percentage decrease in the amount Linda saved in June compared to April?
|
Savings |
April |
100% |
|
Change |
- 20% |
|
May |
80% |
100 u |
Change |
|
+ 20 u |
June |
|
120 u |
(a)
Savings in April = 100%
Savings in May = 100% - 20% = 80%
80% = 480
1% = 480 ÷ 80 = 6
Savings in April
= 100%
= 100 x 6
= $600
Savings in May = 100 u
Savings in June = 100 u + 20 u = 120 u
100 u = 480
1 u = 480 ÷ 100 = 4.8
Savings in June
= 120 u
= 120 x 4.8
= $576
Total savings from April to June
= 600 + 480 + 576
= $1656
(b)
Decrease in savings in June compared to April
= 600 - 576
= $24
Percentage decrease
=
Decrease in savingsSavings in April x 100%
=
24600 x 100%
= 4%
Answer(s): (a) $1656; (b) 4%