Mary understands 25% of her math homework. Her friend Joe understands one third as much as Mary does. About how much of the homework does Joe understand?

8.3%

Step-by-step explanation:

get 25% as a decimal

25/100=.25

get 1/3 as a decimal

1/3=.33333

multiply the decimals together

.33333x. 25=.08333

multiply this decimal by 100

.08333x100=8.3%

1/12

Step-by-step explanation:

25% is equivalent to 1/4

hence Mary understands 25% = 1/4 of her homework

given that Joe understands 1/3 as much as Mary

= 1/4 x 1/3

= 1/12

hence Joe understands 1/12 of the total homework.