Subtract 20/35 from 3/30
3/30 - 20/35 is -33/70.
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,
3/30 = 3 × 7/30 × 7 = 21/210 - Likewise, for the 2nd fraction, since 35 × 6 = 210,
20/35 = 20 × 6/35 × 6 = 120/210 - Subtract the two like fractions:
21/210 - 120/210 = 21 - 120/210 = -99/210 - After reducing the fraction, the answer is -33/70
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 6/30-20/35 3/30-40/35 3/60-20/35 3/30-20/70 9/30-20/35 3/30-60/35 3/90-20/35 15/30-20/35 21/30-20/35