2.0.4/2=0.5/2.5
1. From the question, you can set 5/8 of x equal to Y.
That is 5/X=y/8.
Get: X*Y=5*8=40.
Four combinations of 1, 40 2, 20 4, 10 5, 8 can be obtained. You can bring it in.
2. The principle is the same as above, 0.7,90.9,7 is enough.