15целых-7целых3/5+0+2целых7/8=???????

Question

15целых-7целых3/5+0+2целых7/8=???????

Answer 1

15-7 3/5+0+2 7/8= 14 5/5 -7 3/5+2 7/8=

=7 2/5+2 7/8=37/5+23/8= (37*8+23*5)/40=

=(296+115)/40=411/40=10 11/40