Subtract 9/70 from 9/80
9/80 - 9/70 is -9/560.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 80 and 70 is 560
Next, find the equivalent fraction of both fractional numbers with denominator 560 - For the 1st fraction, since 80 × 7 = 560,
9/80 = 9 × 7/80 × 7 = 63/560 - Likewise, for the 2nd fraction, since 70 × 8 = 560,
9/70 = 9 × 8/70 × 8 = 72/560 - Subtract the two like fractions:
63/560 - 72/560 = 63 - 72/560 = -9/560
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 18/80-9/70 9/80-18/70 27/80-9/70 9/80-27/70 45/80-9/70 9/80-45/70 63/80-9/70 9/80-63/70