The first place after the point is for tenths, second place for hundredths etc. So 1.125 is 1 + 1/10 + 2/100 + 5/1000, or if you like, 1+ 125/1000, or 1125/1000
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1125/1000 or 9/8
1.125 = 1125/1000 = 9/8
How do convert -12.405 into a fraction
0.04
112.5 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 1125/10 which can be simplified to 225/2. But simplification will mean that you lose information about the precision of the fraction.