Double discount

Algebra Level 1

Manish went to a mall where there was a discount of 10%.Manish buyed some clothes .As he was expert in bargaining he got an another discount of 10%.He thought how much is the single discount equivalent to two successive discount.Please help manish.


The answer is 19.

Saurav Sah by Saurav Sah , 20, India

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3 solutions

Sunil Pradhan
Apr 10, 2014

when 2 successive discounts A an B then overall discount = A + B – (AB)/100

= 10 + 10 – 10×10/100 = 19

2 Helpful 0 Interesting 0 Brilliant 0 Confused
Krishna Ramesh
Apr 14, 2014

let the initial cost be 100

then after first discount of 10%, it becomes 90

the after second discount of 10%, it becomes 81

so, total discount=(100-81)%=19%

1 Helpful 0 Interesting 0 Brilliant 0 Confused
Siddharth Ghosh
Apr 18, 2014

Its a general formula for that.. a= first discount , b= second discount then total discount = a+b-((a*b)/100)

0 Helpful 0 Interesting 0 Brilliant 0 Confused

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