11/16X7/14+7/16X13/14=11/16X7/14+13/16X7/14=(11/16+13/16)X7/14=24/16X7/14=3/2X1/2=3/4
11/16×7/14+7/16×13/14=(11*7+7*13)/(16*14)=(77+91)/(16*14)=168/(16*14)=3/4