PSLE Linda saved $480 in April. This amount was a 40% decrease from what she saved in March. The amount she saved in May was a 45% increase from what she saved in April.
- What was the total amount that Linda saved from March to May?
- What was the percentage decrease in the amount Linda saved in May compared to March?
|
Savings |
March |
100% |
|
Change |
- 40% |
|
April |
60% |
100 u |
Change |
|
+ 45 u |
May |
|
145 u |
(a)
Savings in March = 100%
Savings in April = 100% - 40% = 60%
60% = 480
1% = 480 ÷ 60 = 8
Savings in March
= 100%
= 100 x 8
= $800
Savings in April = 100 u
Savings in May = 100 u + 45 u = 145 u
100 u = 480
1 u = 480 ÷ 100 = 4.8
Savings in May
= 145 u
= 145 x 4.8
= $696
Total savings from March to May
= 800 + 480 + 696
= $1976
(b)
Decrease in savings in May compared to March
= 800 - 696
= $104
Percentage decrease
=
Decrease in savingsSavings in March x 100%
=
104800 x 100%
= 13%
Answer(s): (a) $1976; (b) 13%