Okay you need to change the denominator to the same. 56 is the new denominator. 5×7=35, 2×8=16. The new fractions are 35/56 and 16/56. Now you divide across the top leaving the denominator alone. 35-16=19. And you can turn it into a decimal by dividing the numerator by the denominator. 19÷56=.3392857142857 which is rounded to .34 ANSWER: 19/56=.34