Subtract 21/30 from 10/35
10/35 - 21/30 is -29/70.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 35 and 30 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 35 × 6 = 210,
10/35 = 10 × 6/35 × 6 = 60/210 - Likewise, for the 2nd fraction, since 30 × 7 = 210,
21/30 = 21 × 7/30 × 7 = 147/210 - Subtract the two like fractions:
60/210 - 147/210 = 60 - 147/210 = -87/210 - After reducing the fraction, the answer is -29/70
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 20/35-21/30 10/35-42/30 10/70-21/30 10/35-21/60 30/35-21/30 10/35-63/30 10/35-21/90 50/35-21/30 70/35-21/30