Subtract 30/35 from 9/20
9/20 - 30/35 is -57/140.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 35 is 140
Next, find the equivalent fraction of both fractional numbers with denominator 140 - For the 1st fraction, since 20 × 7 = 140,
9/20 = 9 × 7/20 × 7 = 63/140 - Likewise, for the 2nd fraction, since 35 × 4 = 140,
30/35 = 30 × 4/35 × 4 = 120/140 - Subtract the two like fractions:
63/140 - 120/140 = 63 - 120/140 = -57/140
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 18/20-30/35 9/20-60/35 9/40-30/35 9/20-30/70 27/20-30/35 9/20-90/35 9/60-30/35 45/20-30/35 63/20-30/35