PSLE Linda saved $540 in May. This amount was a 40% decrease from what she saved in April. The amount she saved in June was a 15% 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 |
- 40% |
|
May |
60% |
100 u |
Change |
|
+ 15 u |
June |
|
115 u |
(a)
Savings in April = 100%
Savings in May = 100% - 40% = 60%
60% = 540
1% = 540 ÷ 60 = 9
Savings in April
= 100%
= 100 x 9
= $900
Savings in May = 100 u
Savings in June = 100 u + 15 u = 115 u
100 u = 540
1 u = 540 ÷ 100 = 5.4
Savings in June
= 115 u
= 115 x 5.4
= $621
Total savings from April to June
= 900 + 540 + 621
= $2061
(b)
Decrease in savings in June compared to April
= 900 - 621
= $279
Percentage decrease
=
Decrease in savingsSavings in April x 100%
=
279900 x 100%
= 31%
Answer(s): (a) $2061; (b) 31%