Subtract 3/81 from 4/70
4/70 - 3/81 is 19/945.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 70 and 81 is 5670
Next, find the equivalent fraction of both fractional numbers with denominator 5670 - For the 1st fraction, since 70 × 81 = 5670,
4/70 = 4 × 81/70 × 81 = 324/5670 - Likewise, for the 2nd fraction, since 81 × 70 = 5670,
3/81 = 3 × 70/81 × 70 = 210/5670 - Subtract the two like fractions:
324/5670 - 210/5670 = 324 - 210/5670 = 114/5670 - After reducing the fraction, the answer is 19/945
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 8/70-3/81 4/70-6/81 12/70-3/81 4/70-9/81 20/70-3/81 4/70-15/81 28/70-3/81 4/70-21/81