Subtract 9/10 from 9/72
9/72 - 9/10 is -31/40.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 72 and 10 is 360
Next, find the equivalent fraction of both fractional numbers with denominator 360 - For the 1st fraction, since 72 × 5 = 360,
9/72 = 9 × 5/72 × 5 = 45/360 - Likewise, for the 2nd fraction, since 10 × 36 = 360,
9/10 = 9 × 36/10 × 36 = 324/360 - Subtract the two like fractions:
45/360 - 324/360 = 45 - 324/360 = -279/360 - After reducing the fraction, the answer is -31/40
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 18/72-9/10 9/72-18/10 9/72-9/20 27/72-9/10 9/72-27/10 9/72-9/30 45/72-9/10 9/72-45/10 9/72-9/50 63/72-9/10 9/72-63/10 9/72-9/70