(3/4 + 2 3/8) * 25,8
(3/4 + 2 3/8) * 25,8=80,625 1) 3/4+ 2 3/8=3/4+ 19/8= 6/8+19/8= 25/8 2) 25/8*25,8= 25/8*258/10= 6450/80= 645/8= 80 5/8= 80,625