PSLE Linda saved $660 in July. This amount was a 10% increase from what she saved in June. The amount she saved in August was a 30% decrease from what she saved in July.
- What was the total amount that Linda saved from June to August?
- What was the percentage decrease in the amount Linda saved in August compared to June?
|
Savings |
June |
100% |
|
Change |
+ 10% |
|
July |
110% |
100 u |
Change |
|
- 30 u |
August |
|
70 u |
(a)
Savings in June = 100%
Savings in July = 100% + 10% = 110%
110% = 660
1% = 660 ÷ 110 = 6
Savings in June
= 100%
= 100 x 6
= $600
Savings in July = 100 u
Savings in August = 100 u - 30 u = 70 u
100 u = 660
1 u = 660 ÷ 100 = 6.6
Savings in August
= 70 u
= 70 x 6.6
= $462
Total savings from June to August
= 600 + 660 + 462
= $1722
(b)
Decrease in savings in August compared to June
= 600 - 462
= $138
Percentage decrease
=
Decrease in savingsSavings in June x 100%
=
138600 x 100%
= 23%
Answer(s): (a) $1722; (b) 23%