Question

A book costing 15 P was sold at 18 P what is the gain or loss percent

Answer 1

C. P =15 p
S. P =18 p
Gain = sp - cp
=18p - 15p
=3p
Gain% = gain/cp x 100 %
=3p/15p x 100%
=20%
Therefore, gain% = 20%
Hope it helps...!!!

Answer 2

The gain percent = 20%

Given :

A book costing 15 P was sold at 18 P

To find :

The gain or loss percent

Solution :

Step 1 of 3 :

Write down Cost price and Selling price

Here it is given that a book costing 15 P was sold at 18 P

Cost price of = CP = 15 P

Selling price = SP = 18 P

Step 2 of 3 :

Calculate amount of gain or loss

Now 18 > 15

∴ Selling price > Cost price

So there is gain

Gain amount

= 18 P - 15 P

= 3 P

Step 3 of 3 :

Calculate gain percent

Hence the required gain percentage

$\displaystyle \sf{ = \dfrac{Gain}{CP} \times 100 \% }$

$\displaystyle \sf{ = \frac{3}{15} \times 100 \% }$

$\displaystyle \sf{ = \frac{1}{5} \times 100 \% }$

$\displaystyle \sf{ = 20 \% }$

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