Subtract 2/30 from 15/70
15/70 - 2/30 is 31/210.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 70 and 30 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 70 × 3 = 210,
15/70 = 15 × 3/70 × 3 = 45/210 - Likewise, for the 2nd fraction, since 30 × 7 = 210,
2/30 = 2 × 7/30 × 7 = 14/210 - Subtract the two like fractions:
45/210 - 14/210 = 45 - 14/210 = 31/210
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 30/70-2/30 15/70-4/30 15/70-2/60 45/70-2/30 15/70-6/30 15/70-2/90 75/70-2/30 15/70-10/30 15/70-14/30