Answer:
Sally and Carla were making chocolate cakes. Sally used 2 2/7 chocolate and Carla used 2 6/10. Who used more chocolate to make their cake?
Sally used 16/7 chocolate
2 2/7 = (2*7)+2)/7 = 16/7
Carla used 26/10 or 13/5 chocolate
2 6/10=(2*10)+6)/10 = 26/10= 13/5
to answer we put the 2 fractions with the common denominator 35
Sally: 16/7 = 80/35
Carla: 13/5 = 91/35
It was Carla who used more chocolate to make her cake