PSLE
Linda spent $560 in September. This amount was a 40% increase from what she spent in August. The amount she spent in October was a 5% decrease from what she spent in September.

1. What was the total amount that Linda spent from August to October?
2. What was the percentage increase in the amount Linda spent in October compared to August?

	Spending
August	100%
Change	+ 40%
September	140%	100 u
Change		- 5 u
October		95 u

(a)
Spending in August = 100%
Spending in September = 100% + 40% = 140%

140% = 560

1% = 560 ÷ 140 = 4

Spending in August
= 100% 
= 100 x 4
= $400

Spending in September = 100 u
Spending in October = 100 u - 5 u = 95 u 

100 u = 560

1 u = 560 ÷ 100 = 5.6

Spending in October
= 95 u
= 95 x 5.6
= $532

Total spending from August to October
= 400 + 560 + 532
= $1492

(b)
Increase in spending in October compared to August
= 532 - 400
= $132

Percentage increase
= ^{Increase in spending}_{Spending in August} x 100%
= ¹³²₄₀₀ x 100%
= 33%

Answer(s): (a) $1492; (b) 33%