PSLE Linda saved $1050 in April. This amount was a 50% increase from what she saved in March. The amount she saved in May was a 30% 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 |
+ 50% |
|
April |
150% |
100 u |
Change |
|
- 30 u |
May |
|
70 u |
(a)
Savings in March = 100%
Savings in April = 100% + 50% = 150%
150% = 1050
1% = 1050 ÷ 150 = 7
Savings in March
= 100%
= 100 x 7
= $700
Savings in April = 100 u
Savings in May = 100 u - 30 u = 70 u
100 u = 1050
1 u = 1050 ÷ 100 = 10.5
Savings in May
= 70 u
= 70 x 10.5
= $735
Total savings from March to May
= 700 + 1050 + 735
= $2485
(b)
Increase in savings in May compared to March
= 735 - 700
= $35
Percentage increase
=
Increase in savingsSavings in March x 100%
=
35700 x 100%
= 5%
Answer(s): (a) $2485; (b) 5%