PSLE Linda saved $650 in July. This amount was a 30% increase from what she saved in June. The amount she saved in August was a 20% decrease from what she saved in July.
- What was the total amount that Linda saved from June to August?
- What was the percentage increase in the amount Linda saved in August compared to June?
|
Savings |
June |
100% |
|
Change |
+ 30% |
|
July |
130% |
100 u |
Change |
|
- 20 u |
August |
|
80 u |
(a)
Savings in June = 100%
Savings in July = 100% + 30% = 130%
130% = 650
1% = 650 ÷ 130 = 5
Savings in June
= 100%
= 100 x 5
= $500
Savings in July = 100 u
Savings in August = 100 u - 20 u = 80 u
100 u = 650
1 u = 650 ÷ 100 = 6.5
Savings in August
= 80 u
= 80 x 6.5
= $520
Total savings from June to August
= 500 + 650 + 520
= $1670
(b)
Increase in savings in August compared to June
= 520 - 500
= $20
Percentage increase
=
Increase in savingsSavings in June x 100%
=
20500 x 100%
= 4%
Answer(s): (a) $1670; (b) 4%