Explicación paso a paso:
4/10 de 250 = se multiplica 4 250
---- . -------- =
10 1
4 x 250 = 1000
------------ = -------- = 100
10 x 1 10
2/4 de 10 = se multiplica 2 10
----- . ------- =
4 1
2 x 10 20
---------- = -------- = 5
4 x 1 4
6/8 de 400 = se multiplica 6 400
---- . ------- =
8 1
6 x 400 2400
-------------- = ----------- = 300
8 x 1 8
