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