PSLE Linda saved $675 in June. This amount was a 35% increase from what she saved in May. The amount she saved in July was a 20% decrease from what she saved in June.
- What was the total amount that Linda saved from May to July?
- What was the percentage increase in the amount Linda saved in July compared to May?
|
Savings |
May |
100% |
|
Change |
+ 35% |
|
June |
135% |
100 u |
Change |
|
- 20 u |
July |
|
80 u |
(a)
Savings in May = 100%
Savings in June = 100% + 35% = 135%
135% = 675
1% = 675 ÷ 135 = 5
Savings in May
= 100%
= 100 x 5
= $500
Savings in June = 100 u
Savings in July = 100 u - 20 u = 80 u
100 u = 675
1 u = 675 ÷ 100 = 6.75
Savings in July
= 80 u
= 80 x 6.75
= $540
Total savings from May to July
= 500 + 675 + 540
= $1715
(b)
Increase in savings in July compared to May
= 540 - 500
= $40
Percentage increase
=
Increase in savingsSavings in May x 100%
=
40500 x 100%
= 8%
Answer(s): (a) $1715; (b) 8%