PSLE Linda saved $240 in April. This amount was a 20% decrease from what she saved in March. The amount she saved in May was a 45% 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 |
- 20% |
|
April |
80% |
100 u |
Change |
|
+ 45 u |
May |
|
145 u |
(a)
Savings in March = 100%
Savings in April = 100% - 20% = 80%
80% = 240
1% = 240 ÷ 80 = 3
Savings in March
= 100%
= 100 x 3
= $300
Savings in April = 100 u
Savings in May = 100 u + 45 u = 145 u
100 u = 240
1 u = 240 ÷ 100 = 2.4
Savings in May
= 145 u
= 145 x 2.4
= $348
Total savings from March to May
= 300 + 240 + 348
= $888
(b)
Increase in savings in May compared to March
= 348 - 300
= $48
Percentage increase
=
Increase in savingsSavings in March x 100%
=
48300 x 100%
= 16%
Answer(s): (a) $888; (b) 16%