Subtract 7/30 from 30/70
30/70 - 7/30 is 41/210.
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,
30/70 = 30 × 3/70 × 3 = 90/210 - Likewise, for the 2nd fraction, since 30 × 7 = 210,
7/30 = 7 × 7/30 × 7 = 49/210 - Subtract the two like fractions:
90/210 - 49/210 = 90 - 49/210 = 41/210
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 60/70-7/30 30/70-14/30 30/70-7/60 90/70-7/30 30/70-21/30 30/70-7/90 30/70-35/30 30/70-49/30