PSLE Linda saved $810 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% = 810
1% = 810 ÷ 135 = 6
Savings in May
= 100%
= 100 x 6
= $600
Savings in June = 100 u
Savings in July = 100 u - 20 u = 80 u
100 u = 810
1 u = 810 ÷ 100 = 8.1
Savings in July
= 80 u
= 80 x 8.1
= $648
Total savings from May to July
= 600 + 810 + 648
= $2058
(b)
Increase in savings in July compared to May
= 648 - 600
= $48
Percentage increase
=
Increase in savingsSavings in May x 100%
=
48600 x 100%
= 8%
Answer(s): (a) $2058; (b) 8%