Answer to Question #248202 in Algebra for math101

Question

a mobile phone was listed for $432 less 30% 12.5% 5% . What is the exact single rate of discount that was allowed

Answer 1

First $30$ % discount:

$\frac{30}{100}\times432=129.6$

$432-129.6=302.4$

Second 12.5 % discount:

$\frac{12.5}{100}\times302.4=37.8$

$302.4-37.8=264.6$

Third 5% discount:

$\frac{5}{100}\times264.6=13.23$

$264.6-13.23=251.37$

The exact single rate of discount is:

$\frac{432-251.37}{432}\times100=41.81$

$=41.81$ %