PSLE Linda saved $280 in April. This amount was a 30% decrease from what she saved in March. The amount she saved in May was a 50% increase from what she saved in April.
- What was the total amount that Linda saved from March to May?
- What was the percentage increase in the amount Linda saved in May compared to March?
|
Savings |
March |
100% |
|
Change |
- 30% |
|
April |
70% |
100 u |
Change |
|
+ 50 u |
May |
|
150 u |
(a)
Savings in March = 100%
Savings in April = 100% - 30% = 70%
70% = 280
1% = 280 ÷ 70 = 4
Savings in March
= 100%
= 100 x 4
= $400
Savings in April = 100 u
Savings in May = 100 u + 50 u = 150 u
100 u = 280
1 u = 280 ÷ 100 = 2.8
Savings in May
= 150 u
= 150 x 2.8
= $420
Total savings from March to May
= 400 + 280 + 420
= $1100
(b)
Increase in savings in May compared to March
= 420 - 400
= $20
Percentage increase
=
Increase in savingsSavings in March x 100%
=
20400 x 100%
= 5%
Answer(s): (a) $1100; (b) 5%