Subtract 6/45 from 4/72
4/72 - 6/45 is -7/90.
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,
4/72 = 4 × 5/72 × 5 = 20/360 - Likewise, for the 2nd fraction, since 45 × 8 = 360,
6/45 = 6 × 8/45 × 8 = 48/360 - Subtract the two like fractions:
20/360 - 48/360 = 20 - 48/360 = -28/360 - After reducing the fraction, the answer is -7/90
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 8/72-6/45 4/72-12/45 4/72-6/90 12/72-6/45 4/72-18/45 20/72-6/45 4/72-30/45 28/72-6/45 4/72-42/45