PSLE Linda saved $1040 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% = 1040
1% = 1040 ÷ 130 = 8
Savings in May
= 100%
= 100 x 8
= $800
Savings in June = 100 u
Savings in July = 100 u - 10 u = 90 u
100 u = 1040
1 u = 1040 ÷ 100 = 10.4
Savings in July
= 90 u
= 90 x 10.4
= $936
Total savings from May to July
= 800 + 1040 + 936
= $2776
(b)
Increase in savings in July compared to May
= 936 - 800
= $136
Percentage increase
=
Increase in savingsSavings in May x 100%
=
136800 x 100%
= 17%
Answer(s): (a) $2776; (b) 17%