It is the largest value minus the smallest= 52 pounds - 30 pounds = 22 pounds.
52 minus 26 is 26.
If you want 52 minus 25% of 52, then multiply 52 by .25 and subtract the result from 52.
365 times 52 minus 52 plus 1 = 18,929
52
52 - 47 = 5
52 - 24 = 28
52 - 18 = 34
52 - 44 = 8
52 - 12 = 40
52 - 29 = 23
87 - 52 = 35