PSLE Linda saved $260 in June. This amount was a 30% increase from what she saved in May. The amount she saved in July was a 10% 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 |
+ 30% |
|
June |
130% |
100 u |
Change |
|
- 10 u |
July |
|
90 u |
(a)
Savings in May = 100%
Savings in June = 100% + 30% = 130%
130% = 260
1% = 260 ÷ 130 = 2
Savings in May
= 100%
= 100 x 2
= $200
Savings in June = 100 u
Savings in July = 100 u - 10 u = 90 u
100 u = 260
1 u = 260 ÷ 100 = 2.6
Savings in July
= 90 u
= 90 x 2.6
= $234
Total savings from May to July
= 200 + 260 + 234
= $694
(b)
Increase in savings in July compared to May
= 234 - 200
= $34
Percentage increase
=
Increase in savingsSavings in May x 100%
=
34200 x 100%
= 17%
Answer(s): (a) $694; (b) 17%