шесть пятых / 4/15 - 8 1/4 + 1 5/16 х 4/7

Решение: 4/15 - 33/4 + 21/16 * 4/7 = -107/15 + 84/112 = -107/15 + 3/4 = -107/15 + 45/60 = -107/15 + 3/4 = -107/15 + 60/60 = -107/15 + 64/60 = -107/15 + 64/60 = -107/15 + 32/30 = -107/15 + 16/15 = -91/15