1/3 times , 3/4 times 4/5=?
just multiply the tops and bottoms
1/3 * 3/4 * 4/5 = 12/60
Or, notice that the 3's and 4's cancel, leaving just
(1*3*4)/(3*4*5) = 1/5
1/3 * 3/4 * 4/5 = 12/60
Or, notice that the 3's and 4's cancel, leaving just
(1*3*4)/(3*4*5) = 1/5