PSLE Linda saved $910 in April. This amount was a 30% increase from what she saved in March. The amount she saved in May was a 20% 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 |
|
- 20 u |
May |
|
80 u |
(a)
Savings in March = 100%
Savings in April = 100% + 30% = 130%
130% = 910
1% = 910 ÷ 130 = 7
Savings in March
= 100%
= 100 x 7
= $700
Savings in April = 100 u
Savings in May = 100 u - 20 u = 80 u
100 u = 910
1 u = 910 ÷ 100 = 9.1
Savings in May
= 80 u
= 80 x 9.1
= $728
Total savings from March to May
= 700 + 910 + 728
= $2338
(b)
Increase in savings in May compared to March
= 728 - 700
= $28
Percentage increase
=
Increase in savingsSavings in March x 100%
=
28700 x 100%
= 4%
Answer(s): (a) $2338; (b) 4%