What was the original price of an item if a discount of 20 percent reduced the price to Rs. 100?

A. Rs. 80

B. Rs. 120

C. Rs. 125

D. Rs. 150

E. Rs. 250

Let the original price be x.

After a discount of 20%, was effected.

It means the value was reduced to: (100% - 20%) = 80% of the original value

80% of x = 100

(80/100) * x = 100

8x/10 = 100

8x = 10*100

x = (10*100) / 8

x = 125

Original price = Rs. 125

Option C.