Subtract 15/35 from 18/20
18/20 - 15/35 is 33/70.
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,
18/20 = 18 × 7/20 × 7 = 126/140 - Likewise, for the 2nd fraction, since 35 × 4 = 140,
15/35 = 15 × 4/35 × 4 = 60/140 - Subtract the two like fractions:
126/140 - 60/140 = 126 - 60/140 = 66/140 - 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: 36/20-15/35 18/20-30/35 18/40-15/35 18/20-15/70 54/20-15/35 18/20-45/35 18/60-15/35 90/20-15/35 18/20-75/35