PSLE Linda saved $275 in May. This amount was a 45% decrease from what she saved in April. The amount she saved in June was a 20% increase 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 |
55% |
100 u |
Change |
|
+ 20 u |
June |
|
120 u |
(a)
Savings in April = 100%
Savings in May = 100% - 45% = 55%
55% = 275
1% = 275 ÷ 55 = 5
Savings in April
= 100%
= 100 x 5
= $500
Savings in May = 100 u
Savings in June = 100 u + 20 u = 120 u
100 u = 275
1 u = 275 ÷ 100 = 2.75
Savings in June
= 120 u
= 120 x 2.75
= $330
Total savings from April to June
= 500 + 275 + 330
= $1105
(b)
Decrease in savings in June compared to April
= 500 - 330
= $170
Percentage decrease
=
Decrease in savingsSavings in April x 100%
=
170500 x 100%
= 34%
Answer(s): (a) $1105; (b) 34%