Question

A bookstore marks up the cost of a book from $6 to $10.
What was the percent increase?

A) 66.7%
B) 34%
C) 16%
D) 2%

Answer 1

Cost of a book has been increased from $6 to $10.

So, increase in cost= 10-6=4.

Now percent increase=$\frac{Increase in cost}{original cost}$

=$\frac{4}{6}$

=$\frac{4}{6} *100%$

=0.667*100%

= 66.7%