PSLE Linda saved $1400 in July. This amount was a 40% 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 |
+ 40% |
|
July |
140% |
100 u |
Change |
|
- 30 u |
August |
|
70 u |
(a)
Savings in June = 100%
Savings in July = 100% + 40% = 140%
140% = 1400
1% = 1400 ÷ 140 = 10
Savings in June
= 100%
= 100 x 10
= $1000
Savings in July = 100 u
Savings in August = 100 u - 30 u = 70 u
100 u = 1400
1 u = 1400 ÷ 100 = 14
Savings in August
= 70 u
= 70 x 14
= $980
Total savings from June to August
= 1000 + 1400 + 980
= $3380
(b)
Decrease in savings in August compared to June
= 1000 - 980
= $20
Percentage decrease
=
Decrease in savingsSavings in June x 100%
=
201000 x 100%
= 2%
Answer(s): (a) $3380; (b) 2%