PSLE Linda saved $170 in April. This amount was a 15% 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 |
- 15% |
|
April |
85% |
100 u |
Change |
|
+ 40 u |
May |
|
140 u |
(a)
Savings in March = 100%
Savings in April = 100% - 15% = 85%
85% = 170
1% = 170 ÷ 85 = 2
Savings in March
= 100%
= 100 x 2
= $200
Savings in April = 100 u
Savings in May = 100 u + 40 u = 140 u
100 u = 170
1 u = 170 ÷ 100 = 1.7
Savings in May
= 140 u
= 140 x 1.7
= $238
Total savings from March to May
= 200 + 170 + 238
= $608
(b)
Increase in savings in May compared to March
= 238 - 200
= $38
Percentage increase
=
Increase in savingsSavings in March x 100%
=
38200 x 100%
= 19%
Answer(s): (a) $608; (b) 19%