PSLE Linda saved $750 in August. This amount was a 50% increase from what she saved in July. The amount she saved in September was a 10% decrease from what she saved in August.
- What was the total amount that Linda saved from July to September?
- What was the percentage increase in the amount Linda saved in September compared to July?
|
Savings |
July |
100% |
|
Change |
+ 50% |
|
August |
150% |
100 u |
Change |
|
- 10 u |
September |
|
90 u |
(a)
Savings in July = 100%
Savings in August = 100% + 50% = 150%
150% = 750
1% = 750 ÷ 150 = 5
Savings in July
= 100%
= 100 x 5
= $500
Savings in August = 100 u
Savings in September = 100 u - 10 u = 90 u
100 u = 750
1 u = 750 ÷ 100 = 7.5
Savings in September
= 90 u
= 90 x 7.5
= $675
Total savings from July to September
= 500 + 750 + 675
= $1925
(b)
Increase in savings in September compared to July
= 675 - 500
= $175
Percentage increase
=
Increase in savingsSavings in July x 100%
=
175500 x 100%
= 35%
Answer(s): (a) $1925; (b) 35%