- 2/3 * 6/7 * 1/10= - 4/7 * 1/10= - 4/70= - 2/35
- 6/7 * ( -3/5) * 6/5=6/7*3/5*6/5=108/175
-24/36 * (-3/4)*(-2/9)= - 2/3 * 3/4 * 2/9= - 1/9
- 2/3 * 5/6 * ( -9/10)=(2*5*9) / (3*6*10)=1/2
- 1/3 * (-135) * 1/5=1/3 * 135 * 1/5=135/15=9
2/7 * (-21) * (-1/3)=2/7 * 21 * 1/3=2/21 * 21=2