Subtract 12/45 from 7/72
7/72 - 12/45 is -61/360.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 72 and 45 is 360
Next, find the equivalent fraction of both fractional numbers with denominator 360 - For the 1st fraction, since 72 × 5 = 360,
7/72 = 7 × 5/72 × 5 = 35/360 - Likewise, for the 2nd fraction, since 45 × 8 = 360,
12/45 = 12 × 8/45 × 8 = 96/360 - Subtract the two like fractions:
35/360 - 96/360 = 35 - 96/360 = -61/360
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 14/72-12/45 7/72-24/45 7/72-12/90 21/72-12/45 7/72-36/45 35/72-12/45 7/72-60/45 49/72-12/45 7/72-84/45