Thursday, December 30, 2010

Percentage P6

Benny spent 15% of his salary on food and $440 on camera. Then he spent 30% of the remainder on clothes and saved the rest of his salary. He found that the amount he spent on clothes was $120 more than the amount he had spent on food.
(a) How much did he spend on food? Ans: $360
(b) How much did he save? Ans: $1120


30% r --> 15% + $120

70/30 x 15% = 35%

70/30 x 120 = $280

70% r --> 35% + $280

100% - 15% - 15% - 35% = 35%

35% --> 440 + 120 + 280 = $840

15% --> 15/35 x 840 = $360

a) He spent $360 on food.


840 + 280 = $1120

b) He saved $1120.

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