What is the range of 125 110 115 165 145 180

Describe what moves you could use to create the transformation of the original image shown at right

Could somebody me with this radical simplification?

How many liters of peroxide should be added to 12 liters of an 8% peroxide solution so that the resulting solution contains 16% peroxide?   original added new amount of peroxide 0.96 liters x 0.96 + x amount of solution 12 liters x 12 + x 0.18 liter 1.14 liters 1.92 liters 2.10 liters