Subtract 90/35 from 21/10
1st number: 2 1/10, 2nd number: 2 20/35
21/10 - 90/35 is -33/70.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 10 and 35 is 70
Next, find the equivalent fraction of both fractional numbers with denominator 70 - For the 1st fraction, since 10 × 7 = 70,
21/10 = 21 × 7/10 × 7 = 147/70 - Likewise, for the 2nd fraction, since 35 × 2 = 70,
90/35 = 90 × 2/35 × 2 = 180/70 - Subtract the two like fractions:
147/70 - 180/70 = 147 - 180/70 = -33/70
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/10-90/35 21/20-90/35 21/10-90/70 63/10-90/35 21/30-90/35 21/50-90/35 21/70-90/35