It is 4/15.
525/1000 = 21/40
12/35 (180/15 / 525/15)
0.525 written as a fraction = 525/1000
525 over 100. In simplest form it would be 21 over 4.
tl
525% = 21/4
It is 525/1 inches.
It is 525/1 grams. If you want it expressed as a fraction of some other quantity then you need to specify the second quantity.
525/1
If you divide both the numerator and denominator by 25, you get 21/40.
525 = 525/1, although I see no reason why anyone would wish to write it like that.
1.3125