Subtract 4/9 from 21/10
1st number: 2 1/10, 2nd number: 4/9
2110 - 49 is 14990.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 10 and 9 is 90
Next, find the equivalent fraction of both fractional numbers with denominator 90 - For the 1st fraction, since 10 × 9 = 90,
2110 = 21 × 910 × 9 = 18990 - Likewise, for the 2nd fraction, since 9 × 10 = 90,
49 = 4 × 109 × 10 = 4090 - Subtract the two like fractions:
18990 - 4090 = 189 - 4090 = 14990 - In mixed form: 15990
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/10-4/9 21/10-8/9 21/20-4/9 21/10-4/18 63/10-4/9 21/10-12/9 21/30-4/9 21/10-4/27 21/10-20/9 21/50-4/9 21/10-4/45 21/10-28/9 21/70-4/9 21/10-4/63