Subtract 18/35 from 20/30
20/30 - 18/35 is 16/105.
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,
20/30 = 20 × 7/30 × 7 = 140/210 - Likewise, for the 2nd fraction, since 35 × 6 = 210,
18/35 = 18 × 6/35 × 6 = 108/210 - Subtract the two like fractions:
140/210 - 108/210 = 140 - 108/210 = 32/210 - After reducing the fraction, the answer is 16/105
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/30-18/35 20/30-36/35 20/60-18/35 20/30-18/70 60/30-18/35 20/30-54/35 20/90-18/35 20/30-90/35