PSLE Linda saved $480 in April. This amount was a 20% decrease from what she saved in March. The amount she saved in May was a 40% 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 |
|
+ 40 u |
May |
|
140 u |
(a)
Savings in March = 100%
Savings in April = 100% - 20% = 80%
80% = 480
1% = 480 ÷ 80 = 6
Savings in March
= 100%
= 100 x 6
= $600
Savings in April = 100 u
Savings in May = 100 u + 40 u = 140 u
100 u = 480
1 u = 480 ÷ 100 = 4.8
Savings in May
= 140 u
= 140 x 4.8
= $672
Total savings from March to May
= 600 + 480 + 672
= $1752
(b)
Increase in savings in May compared to March
= 672 - 600
= $72
Percentage increase
=
Increase in savingsSavings in March x 100%
=
72600 x 100%
= 12%
Answer(s): (a) $1752; (b) 12%