PSLE Linda saved $440 in April. This amount was a 45% decrease from what she saved in March. The amount she saved in May was a 20% 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 |
- 45% |
|
April |
55% |
100 u |
Change |
|
+ 20 u |
May |
|
120 u |
(a)
Savings in March = 100%
Savings in April = 100% - 45% = 55%
55% = 440
1% = 440 ÷ 55 = 8
Savings in March
= 100%
= 100 x 8
= $800
Savings in April = 100 u
Savings in May = 100 u + 20 u = 120 u
100 u = 440
1 u = 440 ÷ 100 = 4.4
Savings in May
= 120 u
= 120 x 4.4
= $528
Total savings from March to May
= 800 + 440 + 528
= $1768
(b)
Decrease in savings in May compared to March
= 800 - 528
= $272
Percentage decrease
=
Decrease in savingsSavings in March x 100%
=
272800 x 100%
= 34%
Answer(s): (a) $1768; (b) 34%