Percentage question24

Question

24.
The cost of making a table is calculated as follows:
Wood………………$400
Metal………………$200
Paint……………….$ 50
Labour……………..$250
Total: $900
Now, the cost of wood is increased by 28%, that of metal is increased by 25%, that of paint is decreased by 10% and that of labour is increased by 50%.(a) What is the new cost of a table?(b) What is the percentage increase in the cost of a table?

Answer 1

Wood $400 X 1.28 = $512
Metal $200 X 1.25 = $250
Paint $50 X 0.90 = $45
Labour $250 X 1.50 = $375
Total = $1,182.00

Answer 2

a) The new cost is $1,182.00

Wood $400 X 1.28 = $512
Metal $200 X 1.25 = $250
Paint $50 X 0.90 = $45
Labour $250 X 1.50 = $375
Total = $1,182.00

b) 1,182 / 900 = 1.313333
=31.3333333333%
or
=31 1/3 %

Answer 3

Initial costs of table = 400+200+50+250 = 900

Increment as follows : -

Wood = 400 x 128% = 512
Metal = 200 x 125% = 250
Paint = 50 x 90% = 45
Labour = 250 x 150% = 375

(a) New Costs = 512+250+45+375
= 1182
(b) Increase of costs of table = (1182 - 900)/900 x 100
= 282/900 x 100
= 31.33%