Question

shiv went to a restaurant and ordered for a pizza .when he saw the bill,he was surprised to notice that it was Rs 330 which was 10% more than the bill of last time .what was the price of the same pizza when he came last time

Answer 1

Let the original amount be x
(100%+10%)Of x =330
110% of x=330
110/100*x=330
x=300
Original price= Rs 300

Answer 2

simple 
let the cost of pizza earlier be x 
now according to the question it is given that -
 
x + 10% of x = 330
100x/100  + 10x/100 = 330
110x/100 = 330
110x = 330 * 100
110x = 33000
x = 33000/110
x = 300

THEREFORE the cost of pizza when he came last time was Rs 300