Subtract 90/21 from 25/6
1st number: 4 1/6, 2nd number: 4 6/21
25/6 - 90/21 is -5/42.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 6 and 21 is 42
Next, find the equivalent fraction of both fractional numbers with denominator 42 - For the 1st fraction, since 6 × 7 = 42,
25/6 = 25 × 7/6 × 7 = 175/42 - Likewise, for the 2nd fraction, since 21 × 2 = 42,
90/21 = 90 × 2/21 × 2 = 180/42 - Subtract the two like fractions:
175/42 - 180/42 = 175 - 180/42 = -5/42
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 50/6-90/21 25/12-90/21 25/6-90/42 75/6-90/21 25/18-90/21 25/6-90/63 25/30-90/21 25/42-90/21