Question

find the gain or loss per cent when a table costing Rs. 150was sold for Rs. 180

Answer 1

sp of table =180 rs
cp of table =150 rs
gain =180-150
=30 rs
gain percent =30/150 ×100
=20 percent

Answer 2

Gain=180-150=30 RS.
Gain%=gain x 100/ cost price
= 30 x 100/150
=20%

Hope this will be helpful..:-)