Subtract 3/70 from 21/10
1st number: 2 1/10, 2nd number: 3/70
21/10 - 3/70 is 72/35.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 10 and 70 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 70 × 1 = 70,
3/70 = 3 × 1/70 × 1 = 3/70 - Subtract the two like fractions:
147/70 - 3/70 = 147 - 3/70 = 144/70 - After reducing the fraction, the answer is 72/35
- In mixed form: 22/35
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/10-3/70 21/10-6/70 21/20-3/70 63/10-3/70 21/10-9/70 21/30-3/70 21/10-15/70 21/50-3/70 21/10-21/70 21/70-3/70