PSLE Linda saved $855 in April. This amount was a 5% decrease from what she saved in March. The amount she saved in May was a 20% increase 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 |
- 5% |
|
April |
95% |
100 u |
Change |
|
+ 20 u |
May |
|
120 u |
(a)
Savings in March = 100%
Savings in April = 100% - 5% = 95%
95% = 855
1% = 855 ÷ 95 = 9
Savings in March
= 100%
= 100 x 9
= $900
Savings in April = 100 u
Savings in May = 100 u + 20 u = 120 u
100 u = 855
1 u = 855 ÷ 100 = 8.55
Savings in May
= 120 u
= 120 x 8.55
= $1026
Total savings from March to May
= 900 + 855 + 1026
= $2781
(b)
Increase in savings in May compared to March
= 1026 - 900
= $126
Percentage increase
=
Increase in savingsSavings in March x 100%
=
126900 x 100%
= 14%
Answer(s): (a) $2781; (b) 14%