Subtract 21/35 from 1/30
1/30 - 21/35 is -17/30.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 30 and 35 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 30 × 7 = 210,
1/30 = 1 × 7/30 × 7 = 7/210 - Likewise, for the 2nd fraction, since 35 × 6 = 210,
21/35 = 21 × 6/35 × 6 = 126/210 - Subtract the two like fractions:
7/210 - 126/210 = 7 - 126/210 = -119/210 - After reducing the fraction, the answer is -17/30
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 2/30-21/35 1/30-42/35 1/60-21/35 1/30-21/70 3/30-21/35 1/30-63/35 1/90-21/35 5/30-21/35 7/30-21/35