IM SO CONFUSE WITH THIS PLS SOMEONE CAN HELP ME ?

What is the first step of an indirect proof of a number that is divisible by two

Acompany produces packets of soap powder labeled “giant size 32 ounces.” the actual weight of soap powder in such a box has a normal distribution with a mean of 33 oz and a standard deviation of 0.7 oz. to avoid having dissatisfied customers, the company says a box of soap is considered underweight if it weighs less than 32 oz. to avoid losing money, it labels the top 5% (the heaviest 5%) overweight. how heavy does a box have to be for it to be labeled overweight?

George writes the mixed number as sum and uses the distributive property 1/2.-2/5=1/2-2+2/5=1/2