Subtract 3/72 from 1/70
1/70 - 3/72 is -23/840.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 70 and 72 is 2520
Next, find the equivalent fraction of both fractional numbers with denominator 2520 - For the 1st fraction, since 70 × 36 = 2520,
1/70 = 1 × 36/70 × 36 = 36/2520 - Likewise, for the 2nd fraction, since 72 × 35 = 2520,
3/72 = 3 × 35/72 × 35 = 105/2520 - Subtract the two like fractions:
36/2520 - 105/2520 = 36 - 105/2520 = -69/2520 - After reducing the fraction, the answer is -23/840
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 2/70-3/72 1/70-6/72 3/70-3/72 1/70-9/72 5/70-3/72 1/70-15/72 7/70-3/72 1/70-21/72