Subtract 1/45 from 3/72
3/72 - 1/45 is 7/360.
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,
3/72 = 3 × 5/72 × 5 = 15/360 - Likewise, for the 2nd fraction, since 45 × 8 = 360,
1/45 = 1 × 8/45 × 8 = 8/360 - Subtract the two like fractions:
15/360 - 8/360 = 15 - 8/360 = 7/360
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 6/72-1/45 3/72-2/45 3/72-1/90 9/72-1/45 3/72-3/45 15/72-1/45 3/72-5/45 21/72-1/45 3/72-7/45