Question

6: the cost of a protein bar increased from $2.50 to $2.80. the percent increase in the $2.80 rate was how much?

Answer 1

The original cost of protein bar = $2.50
 The increased cost of protein bar = $2.80
 Therefore, the increase in price of the protein bar = $2.80-$2.50 =$0.30 percentage increase = (Difference in price / Original price) x 100
  =(0.30/2.50)x100
  =(3/25)x100
  =3 x 4
  =12%