PSLE Linda saved $700 in November. This amount was a 40% increase from what she saved in October. The amount she saved in December was a 5% decrease from what she saved in November.
- What was the total amount that Linda saved from October to December?
- What was the percentage increase in the amount Linda saved in December compared to October?
|
Savings |
October |
100% |
|
Change |
+ 40% |
|
November |
140% |
100 u |
Change |
|
- 5 u |
December |
|
95 u |
(a)
Savings in October = 100%
Savings in November = 100% + 40% = 140%
140% = 700
1% = 700 ÷ 140 = 5
Savings in October
= 100%
= 100 x 5
= $500
Savings in November = 100 u
Savings in December = 100 u - 5 u = 95 u
100 u = 700
1 u = 700 ÷ 100 = 7
Savings in December
= 95 u
= 95 x 7
= $665
Total savings from October to December
= 500 + 700 + 665
= $1865
(b)
Increase in savings in December compared to October
= 665 - 500
= $165
Percentage increase
=
Increase in savingsSavings in October x 100%
=
165500 x 100%
= 33%
Answer(s): (a) $1865; (b) 33%