PSLE Linda saved $870 in May. This amount was a 45% increase from what she saved in April. The amount she saved in June was a 40% decrease from what she saved in May.
- What was the total amount that Linda saved from April to June?
- What was the percentage decrease in the amount Linda saved in June compared to April?
|
Savings |
April |
100% |
|
Change |
+ 45% |
|
May |
145% |
100 u |
Change |
|
- 40 u |
June |
|
60 u |
(a)
Savings in April = 100%
Savings in May = 100% + 45% = 145%
145% = 870
1% = 870 ÷ 145 = 6
Savings in April
= 100%
= 100 x 6
= $600
Savings in May = 100 u
Savings in June = 100 u - 40 u = 60 u
100 u = 870
1 u = 870 ÷ 100 = 8.7
Savings in June
= 60 u
= 60 x 8.7
= $522
Total savings from April to June
= 600 + 870 + 522
= $1992
(b)
Decrease in savings in June compared to April
= 600 - 522
= $78
Percentage decrease
=
Decrease in savingsSavings in April x 100%
=
78600 x 100%
= 13%
Answer(s): (a) $1992; (b) 13%