Subtract 9/21 from 7/60
7/60 - 9/21 is -131/420.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 60 and 21 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 60 × 7 = 420,
7/60 = 7 × 7/60 × 7 = 49/420 - Likewise, for the 2nd fraction, since 21 × 20 = 420,
9/21 = 9 × 20/21 × 20 = 180/420 - Subtract the two like fractions:
49/420 - 180/420 = 49 - 180/420 = -131/420
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 14/60-9/21 7/60-18/21 7/60-9/42 21/60-9/21 7/60-27/21 7/60-9/63 35/60-9/21 7/60-45/21 49/60-9/21 7/60-63/21