PSLE Linda saved $875 in April. This amount was a 25% increase from what she saved in March. The amount she saved in May was a 40% decrease from what she saved in April.
- What was the total amount that Linda saved from March to May?
- What was the percentage decrease in the amount Linda saved in May compared to March?
|
Savings |
March |
100% |
|
Change |
+ 25% |
|
April |
125% |
100 u |
Change |
|
- 40 u |
May |
|
60 u |
(a)
Savings in March = 100%
Savings in April = 100% + 25% = 125%
125% = 875
1% = 875 ÷ 125 = 7
Savings in March
= 100%
= 100 x 7
= $700
Savings in April = 100 u
Savings in May = 100 u - 40 u = 60 u
100 u = 875
1 u = 875 ÷ 100 = 8.75
Savings in May
= 60 u
= 60 x 8.75
= $525
Total savings from March to May
= 700 + 875 + 525
= $2100
(b)
Decrease in savings in May compared to March
= 700 - 525
= $175
Percentage decrease
=
Decrease in savingsSavings in March x 100%
=
175700 x 100%
= 25%
Answer(s): (a) $2100; (b) 25%