вычеслите:(2 3/5-5/8):19 3/4 ПЛИЗ!!!

1)2 3/5 - 5/8 = 13/5 - 5/8 =(13 × 8 - 5 × 5)/40 =104/40 -25/40 =79/40 = 1 39/402) 1 39/40 ÷ 19 3/4 =79/40  ÷  79/4 = 79/40  ×  4/79 =316/3160=  1/10ответ: 1/10