Subtract 3/45 from 9/72
9/72 - 3/45 is 7/120.
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,
9/72 = 9 × 5/72 × 5 = 45/360 - Likewise, for the 2nd fraction, since 45 × 8 = 360,
3/45 = 3 × 8/45 × 8 = 24/360 - Subtract the two like fractions:
45/360 - 24/360 = 45 - 24/360 = 21/360 - After reducing the fraction, the answer is 7/120
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 18/72-3/45 9/72-6/45 9/72-3/90 27/72-3/45 9/72-9/45 45/72-3/45 9/72-15/45 63/72-3/45 9/72-21/45