Subtract 30/14 from 81/30
1st number: 2 21/30, 2nd number: 2 2/14
81/30 - 30/14 is 39/70.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 30 and 14 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 30 × 7 = 210,
81/30 = 81 × 7/30 × 7 = 567/210 - Likewise, for the 2nd fraction, since 14 × 15 = 210,
30/14 = 30 × 15/14 × 15 = 450/210 - Subtract the two like fractions:
567/210 - 450/210 = 567 - 450/210 = 117/210 - After reducing the fraction, the answer is 39/70
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 81/30-60/14 81/60-30/14 81/30-30/28 81/30-90/14 81/90-30/14 81/30-30/42 81/30-30/70 81/30-30/98