Subtract 8/60 from 72/21
1st number: 3 9/21, 2nd number: 8/60
72/21 - 8/60 is 346/105.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 60 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 21 × 20 = 420,
72/21 = 72 × 20/21 × 20 = 1440/420 - Likewise, for the 2nd fraction, since 60 × 7 = 420,
8/60 = 8 × 7/60 × 7 = 56/420 - Subtract the two like fractions:
1440/420 - 56/420 = 1440 - 56/420 = 1384/420 - After reducing the fraction, the answer is 346/105
- In mixed form: 331/105
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 72/21-16/60 72/42-8/60 72/21-24/60 72/63-8/60 72/21-40/60 72/21-56/60