21.75 is a fraction. It is a fraction in decimal form rather than in the form of a ratio. However, that does not stop it being a fraction. Its rational equivalent is 2175/100 which can be simplified, if required.
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2175/34 is 63.9705882
the fraction 0.112 can be written as 112/1000 or 14/125, to write it in its simplfied fraction from you would write 14/125
It is: 50% = 1/2 as a fraction
2175 ÷ 5 = 435
As an improper fraction in its simplest form it is: 103/2