3\8+2\7 и 59\60+39\40

3/8  +  2/7 =(3 * 7  +  2 * 8)/56 = 21/56  +  16/56 =  37/56 59/60  +  39/40 =(59 *2  +  39 * 3)/120 = 118/120  +  117/120 =  235/120 = 47/24 = 1 23/24

3/8+2/7=5/7 59/60+39/40=1 целая 23/24