0.525 written as a fraction = 525/1000
tl
It is 525/1 inches.
525% = 21/4
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
525/1000 = 21/40
525 = 525/1, although I see no reason why anyone would wish to write it like that.
1.3125
525% = 5.25 = 525/100 = 21/4 = 51/4
2/5
12/35 (180/15 / 525/15)