PSLE Linda saved $700 in April. This amount was a 40% increase from what she saved in March. The amount she saved in May was a 25% decrease 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 |
+ 40% |
|
April |
140% |
100 u |
Change |
|
- 25 u |
May |
|
75 u |
(a)
Savings in March = 100%
Savings in April = 100% + 40% = 140%
140% = 700
1% = 700 ÷ 140 = 5
Savings in March
= 100%
= 100 x 5
= $500
Savings in April = 100 u
Savings in May = 100 u - 25 u = 75 u
100 u = 700
1 u = 700 ÷ 100 = 7
Savings in May
= 75 u
= 75 x 7
= $525
Total savings from March to May
= 500 + 700 + 525
= $1725
(b)
Increase in savings in May compared to March
= 525 - 500
= $25
Percentage increase
=
Increase in savingsSavings in March x 100%
=
25500 x 100%
= 5%
Answer(s): (a) $1725; (b) 5%