PSLE Linda saved $450 in April. This amount was a 25% 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 |
- 25% |
|
April |
75% |
100 u |
Change |
|
+ 40 u |
May |
|
140 u |
(a)
Savings in March = 100%
Savings in April = 100% - 25% = 75%
75% = 450
1% = 450 ÷ 75 = 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 = 450
1 u = 450 ÷ 100 = 4.5
Savings in May
= 140 u
= 140 x 4.5
= $630
Total savings from March to May
= 600 + 450 + 630
= $1680
(b)
Increase in savings in May compared to March
= 630 - 600
= $30
Percentage increase
=
Increase in savingsSavings in March x 100%
=
30600 x 100%
= 5%
Answer(s): (a) $1680; (b) 5%