PSLE Linda saved $840 in April. This amount was a 20% increase from what she saved in March. The amount she saved in May was a 5% 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 |
+ 20% |
|
April |
120% |
100 u |
Change |
|
- 5 u |
May |
|
95 u |
(a)
Savings in March = 100%
Savings in April = 100% + 20% = 120%
120% = 840
1% = 840 ÷ 120 = 7
Savings in March
= 100%
= 100 x 7
= $700
Savings in April = 100 u
Savings in May = 100 u - 5 u = 95 u
100 u = 840
1 u = 840 ÷ 100 = 8.4
Savings in May
= 95 u
= 95 x 8.4
= $798
Total savings from March to May
= 700 + 840 + 798
= $2338
(b)
Increase in savings in May compared to March
= 798 - 700
= $98
Percentage increase
=
Increase in savingsSavings in March x 100%
=
98700 x 100%
= 14%
Answer(s): (a) $2338; (b) 14%