Jasmine spends 1/3 of her day at school. she spends 1/12 of her day eating meals. what fraction of the day does jasmine spend at school or eating meals. do you have to subtract or add

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