Question

The cost price of article is 90% of its selling price find his profit percentage

Answer 1

Let the Selling Price = 100

Given Cost Price  = 90

Profit = Selling price - Cost price

         = 100 - 90

         = 10

Profit% = 10/90 * 100 

            = 11.11%


Hope this helps!

Answer 2

Nice question! l want to answer too.


Given that

Cost Price of an article is 90 % of its selling price.

We have to find profit percentage.

Solution

Let the selling price of an article be ₹ x. Then,

Cost Price = ₹ (90 % of x)
= ₹(90/100 × x)
= ₹9x/10

Profit = Selling Price - Cost Price
= ₹(x - 9x/10)
= ₹(10x - 9x/10)
= ₹x/10

Profit % = Profit/Cost Price × 100
= x/10 ÷ 9x/10 × 100
= x/10 × 10/9x × 100
= 100/9 %
= 11 1/9 % or 11.11 %.



Hope it helps you.
With regards@
Tanisha