Question

Quanto é $\frac{3}{5 }$ X$\frac{1}{4 }$

Answer 1

  3         1   =     3
-----  .   ---       -----
  5         4         20

Answer 2

3 -- 1
--- . ---- = 3/20
5 -- 4

3/5 . 1/4 = 3/20