Question

Shortcut to calculate discount equal to successive discounts

Answer 1

There are no shortcuts to success

Answer 2

suppose successive discounts are m% and n% on the Amount A

then

total discount = (m+n-mn/100)%

for example

20 % and 30% are successive discounts

then total discount =(20+30-20×30/100)

=(50-6)

=44%