From the question, it is assumed that it looks like this 20+1/4-5/8. Using order of operations, you would get 20.875.
If you added some parenthesis like this ((20+1)/4-5)/8, you would get 1/32 or .03125.
14/20 minus 3/5 is 1/10
3/5 - 1/4 = 12/20 - 5/20 = 7/20.
14/20 - 3/5 = 14/20 - 12/20 = 2/20 = 1/10
13/20 minus 3/5 is 1/20
19/20 minus 11/12 = 1/30
1 over 2
11/30 - 1/5 - 1/6 = 0
It is: 1/2
3/4 minus 1/5 is 11/20
0.27
2 minus 2/5 plus 1/2 minus 4 = -1.9
5 over 8