After a mark-up of $40%$ was added to an item a boy sells it for $Rs.35$ . What was his cost price and how much was his mark-up?

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Answer 1 · 2016-12-12T20:40:19

The cost price is Rs.25 and the markup is Rs.10.

The important thing to note here is that you cannot just find 40% of Rs.35 and subtract it.

The boy's cost price represents 100%, onto which 40% is added to give Rs.35.

Therefore Rs.35 represents $140%$ of the cost price and we need to find the value of the 100% and the 40%.

Using
direct proportion:

$35/140 = x/100$

$x = (35xx100)/140$

$x = 25" "larr$ this is the cost price.

$35-25 = 10" "larr$ this is the mark up

Make an equation Let the cost price be $p$

$140% xx p = 35$

$140/100 xx p= 35$

$p = 35 xx 100/140$

$p = 25$

After a mark-up of 40%40% was added to an item a boy sells it for Rs.35Rs.35. What was his cost price and how much was his mark-up?