Susan is creating a solution. A formula for the solution calls for 7/10 mL of water. Susan wants to make 2/7 less of the solution than the formula creates.
How much water should Susan use?
Express your answer as a fraction in simplest form.
Susan wants 2/7 less of the solution. The whole solution is equivalent to 1. So she wants the amount: 1 - 2/7 = 5/7 mL. She takes 5/7 mL of 7/10 mL. Therefore (5/7)*(7/10) = 35/70 = 1/2 mL
