-2.5 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 -25/10 which can be simplified, if required.
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A quarter. 0.25 × 4 = 1 (which is 100%)
As a fraction it is 25/100 (twenty-five over one hundred)
25% is a 1/4 as a fraction
25% = 1/4 as a fraction
25 is an integer and cannot be reduced as a fraction.
25/7 is an improper fraction.
212.68 as a fraction is 5327/25 or 212 and 17/25.