Friends and Family discount

Algebra Level 2

A shopkeeper wants to offer you the "friends and family discount", where he adds 10% to your purchase price and then subtracts 10% from that total.

Is this a good deal?

Yes, you pay less No difference, you pay the same No, you pay more

1 solution

Aryan Gaikwad
Feb 21, 2015

Let the cost be $\$100$

So on adding 10%, the amount will be -

$100+\frac { 10 }{ 100 } \times 100\\ =\quad 110$

And on subtracting 10% from it, the price will be -

$110-\frac { 10 }{ 100 } \times 110\\ =99$

So you pay $1 less.

Nice. giving an initial cost price can be useful in working out the problem.

Chung Kevin - 6 years, 3 months ago