PSLE Linda saved $350 in July. This amount was a 30% decrease from what she saved in June. The amount she saved in August was a 10% increase 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 |
- 30% |
|
July |
70% |
100 u |
Change |
|
+ 10 u |
August |
|
110 u |
(a)
Savings in June = 100%
Savings in July = 100% - 30% = 70%
70% = 350
1% = 350 ÷ 70 = 5
Savings in June
= 100%
= 100 x 5
= $500
Savings in July = 100 u
Savings in August = 100 u + 10 u = 110 u
100 u = 350
1 u = 350 ÷ 100 = 3.5
Savings in August
= 110 u
= 110 x 3.5
= $385
Total savings from June to August
= 500 + 350 + 385
= $1235
(b)
Decrease in savings in August compared to June
= 500 - 385
= $115
Percentage decrease
=
Decrease in savingsSavings in June x 100%
=
115500 x 100%
= 23%
Answer(s): (a) $1235; (b) 23%