Subtract 12/20 from 49/72
49/72 - 12/20 is 29/360.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 72 and 20 is 360
Next, find the equivalent fraction of both fractional numbers with denominator 360 - For the 1st fraction, since 72 × 5 = 360,
49/72 = 49 × 5/72 × 5 = 245/360 - Likewise, for the 2nd fraction, since 20 × 18 = 360,
12/20 = 12 × 18/20 × 18 = 216/360 - Subtract the two like fractions:
245/360 - 216/360 = 245 - 216/360 = 29/360
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 98/72-12/20 49/72-24/20 49/72-12/40 49/72-36/20 49/72-12/60 49/72-60/20 49/72-84/20