PSLE Linda saved $390 in April. This amount was a 30% increase from what she saved in March. The amount she saved in May was a 10% 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 |
+ 30% |
|
April |
130% |
100 u |
Change |
|
- 10 u |
May |
|
90 u |
(a)
Savings in March = 100%
Savings in April = 100% + 30% = 130%
130% = 390
1% = 390 ÷ 130 = 3
Savings in March
= 100%
= 100 x 3
= $300
Savings in April = 100 u
Savings in May = 100 u - 10 u = 90 u
100 u = 390
1 u = 390 ÷ 100 = 3.9
Savings in May
= 90 u
= 90 x 3.9
= $351
Total savings from March to May
= 300 + 390 + 351
= $1041
(b)
Increase in savings in May compared to March
= 351 - 300
= $51
Percentage increase
=
Increase in savingsSavings in March x 100%
=
51300 x 100%
= 17%
Answer(s): (a) $1041; (b) 17%