0.6 can be read as 6 tenths, because the 6 is in the tenths place.
As a fraction, that's 6/10.
60/100 is also equivalent, because you can multiply the numerator and denominator of the fraction 6/10 by 10, and it becomes 60/100. If you do the same thing to both the numerator and denominator then the fraction is still equivalent.
