Subtract 9/10 from 12/72
12/72 - 9/10 is -11/15.
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,
12/72 = 12 × 5/72 × 5 = 60/360 - Likewise, for the 2nd fraction, since 10 × 36 = 360,
9/10 = 9 × 36/10 × 36 = 324/360 - Subtract the two like fractions:
60/360 - 324/360 = 60 - 324/360 = -264/360 - After reducing the fraction, the answer is -11/15
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 24/72-9/10 12/72-18/10 12/72-9/20 36/72-9/10 12/72-27/10 12/72-9/30 60/72-9/10 12/72-45/10 12/72-9/50 84/72-9/10 12/72-63/10 12/72-9/70