160. Вычислите значение выражения |a| : |b|, если: 1) a = 4 2/7, b = -3 3/4; 2) a = -8,64, b = 0,08.

1) a = 4 2/7 = 30/7, b = -3 3/4 = -15/4
|a| : |b| = |30/7| : |-15/4| = (30/7) / (15/4) = (30/7) * (4/15) = (2/7) * (4/1) = 8/7 = 1 1/7
2) a = -8.64, b = 0.08
|a| : |b| = |-8.64| / |0.08| = 8.64 / 0.08 = 864 / 8 = 108