To get to the simplest form you have to divide numerator and denominator by numbers they can both be divided by, until you get to a fraction where you can't divide both anymore getting an integer as a result. Here you can only divide by 2 and you get 1/5. That's the simplest form , if you kept dividing you'd get decimals, but the simplest form must be integers.
The simplest form of 2/10 is 1/5, achieved by dividing both the numerator and the denominator by the greatest common factor, which is 2. ;
The simplest form of 10 2 is 5 1 . This is achieved by dividing both the numerator and denominator by their greatest common divisor, which is 2. Consequently, simplifying results in 5 1 .
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