2:4 And 0.4:0.8

2:4 And 0.4:0.8

0.2 :4=0.05
0.4 :0.8=0.5
The ratio of the two is different and out of proportion
0.2:4=(0.4:0.8)÷10

The ratio of 2 3 6 8 is ()
fast

The product of any two numbers is not equal to the product of the other two numbers

10, 1.2, 8 and 1.5 can form the proportion. Please write down the proportion (at least 8)
6 mathematical exercise book (Southeast University Press) P30 exercise 9 question 3

1.5:1.2=10:8
1.5:10=1.2:8
10:1.5=8:1.2
10:8=1.5:1.2
8:1.2=10:1.5
8:10=1.2:1.5
1.2:8=1.5:10
1.2:1.5=8:10