Question

Find the single discount equivalent to a series discount of 20%, 10%, 5%.

Answer 1

let the amount be x

first 20% X x 20%= .20x

now balance is ..80x

.80x × 10%=..08x

.80x-.08x=.72x

.72x×5%= .036x

=.20+.08+.036=31.6%