Question

Crystal completed 1/3 of her homework assignment on Friday and 3/7 of her assignment on Saturday. what is the amount of her assignment that she has left to complete?

Answer 1

change 1/3 to 9/21 and 3/7 to 9/21 bc they are common factors. add 9/21+9/21 and get 18/21 and then simplify by 3 to get 6/7.