Subtract 7/60 from 30/21
1st number: 1 9/21, 2nd number: 7/60
30/21 - 7/60 is 551/420.
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,
30/21 = 30 × 20/21 × 20 = 600/420 - Likewise, for the 2nd fraction, since 60 × 7 = 420,
7/60 = 7 × 7/60 × 7 = 49/420 - Subtract the two like fractions:
600/420 - 49/420 = 600 - 49/420 = 551/420 - In mixed form: 1131/420
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 60/21-7/60 30/21-14/60 30/42-7/60 90/21-7/60 30/21-21/60 30/63-7/60 30/21-35/60 30/21-49/60