PSLE Linda saved $1305 in April. This amount was a 45% increase from what she saved in March. The amount she saved in May was a 20% decrease from what she saved in April.
- What was the total amount that Linda saved from March to May?
- What was the percentage increase in the amount Linda saved in May compared to March?
|
Savings |
March |
100% |
|
Change |
+ 45% |
|
April |
145% |
100 u |
Change |
|
- 20 u |
May |
|
80 u |
(a)
Savings in March = 100%
Savings in April = 100% + 45% = 145%
145% = 1305
1% = 1305 ÷ 145 = 9
Savings in March
= 100%
= 100 x 9
= $900
Savings in April = 100 u
Savings in May = 100 u - 20 u = 80 u
100 u = 1305
1 u = 1305 ÷ 100 = 13.05
Savings in May
= 80 u
= 80 x 13.05
= $1044
Total savings from March to May
= 900 + 1305 + 1044
= $3249
(b)
Increase in savings in May compared to March
= 1044 - 900
= $144
Percentage increase
=
Increase in savingsSavings in March x 100%
=
144900 x 100%
= 16%
Answer(s): (a) $3249; (b) 16%