Subtract 21/10 from 75/7
1st number: 10 5/7, 2nd number: 2 1/10
75/7 - 21/10 is 603/70.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 7 and 10 is 70
Next, find the equivalent fraction of both fractional numbers with denominator 70 - For the 1st fraction, since 7 × 10 = 70,
75/7 = 75 × 10/7 × 10 = 750/70 - Likewise, for the 2nd fraction, since 10 × 7 = 70,
21/10 = 21 × 7/10 × 7 = 147/70 - Subtract the two like fractions:
750/70 - 147/70 = 750 - 147/70 = 603/70 - In mixed form: 843/70
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 75/7-42/10 75/14-21/10 75/7-21/20 75/7-63/10 75/21-21/10 75/7-21/30 75/35-21/10 75/7-21/50 75/49-21/10 75/7-21/70