Subtract 90/21 from 1/60
1st number: 1/60, 2nd number: 4 6/21
1/60 - 90/21 is -1793/420.
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,
1/60 = 1 × 7/60 × 7 = 7/420 - Likewise, for the 2nd fraction, since 21 × 20 = 420,
90/21 = 90 × 20/21 × 20 = 1800/420 - Subtract the two like fractions:
7/420 - 1800/420 = 7 - 1800/420 = -1793/420
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 2/60-90/21 1/60-90/42 3/60-90/21 1/60-90/63 5/60-90/21 7/60-90/21