.1 repeating is expressed as the fraction (1/9). So we are dealing with 72+ (1/9). As a mixed number, it is just 72 (1/9). To get an improper fraction, first multiple 9 by 72 (denominator times whole number) This is 648. Finally, add 1 (numerator). 649 is the resulting numerator of the improper fraction, 9 being the denominator (keep it the same). Divide 649/9 and you get 72.1111111