PSLE Linda saved $450 in April. This amount was a 50% 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 |
+ 50% |
|
April |
150% |
100 u |
Change |
|
- 20 u |
May |
|
80 u |
(a)
Savings in March = 100%
Savings in April = 100% + 50% = 150%
150% = 450
1% = 450 ÷ 150 = 3
Savings in March
= 100%
= 100 x 3
= $300
Savings in April = 100 u
Savings in May = 100 u - 20 u = 80 u
100 u = 450
1 u = 450 ÷ 100 = 4.5
Savings in May
= 80 u
= 80 x 4.5
= $360
Total savings from March to May
= 300 + 450 + 360
= $1110
(b)
Increase in savings in May compared to March
= 360 - 300
= $60
Percentage increase
=
Increase in savingsSavings in March x 100%
=
60300 x 100%
= 20%
Answer(s): (a) $1110; (b) 20%