Subtract 3/70 from 81/30
1st number: 2 21/30, 2nd number: 3/70
81/30 - 3/70 is 93/35.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 30 and 70 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 70 × 3 = 210,
3/70 = 3 × 3/70 × 3 = 9/210 - Subtract the two like fractions:
567/210 - 9/210 = 567 - 9/210 = 558/210 - After reducing the fraction, the answer is 93/35
- In mixed form: 223/35
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 81/30-6/70 81/60-3/70 81/30-9/70 81/90-3/70 81/30-15/70 81/30-21/70