!5 in decimals is really just 15.000000000... no matter how many more zeros there are it will still be 15 (as a 'decimal')
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0.015 inch
Fifteen twentieths = 15/20 = 0.75
15 and 4/100
22.5/15 15/15 + 7.5/15 = 22.5/15 If you don't want decimals you can multiply the numerator and the denominator by two to get 45/30.
Multiply decimals by 100. Example, 15 as a percent is 15 x 100 = 1,500%