Matt's protein powder is 80% protein.  He weighs 80 kg and wants to eat 2 grams of protein per kilogram of body weight each day.  How much protein powder does he need to eat per week?
How much protein does Matt want to eat each day? ** He wants to eat 80*2=<<80*2=160>>160 grams of protein a day
How much protein does Matt need to eat each day? ** That means he needs 160/.8=<<160/.8=200>>200 grams of protein per day
How much protein does Matt need to eat per week? ** So he needs 200*7=<<200*7=1400>>1400 grams per week
#### 1400