Tolong jawab dengan caranya

1. a) 13/16 -4/8= 13/16-8/16=5/16 
        5/16-1/4=5/16-2/16=3/16
    b)1/3+2/4=4/12+6/12=10/12
        10/12+7/6=10/12+14/12=24/12=2