Subtract 25/70 from 7/72
7/72 - 25/70 is -131/504.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 72 and 70 is 2520
Next, find the equivalent fraction of both fractional numbers with denominator 2520 - For the 1st fraction, since 72 × 35 = 2520,
7/72 = 7 × 35/72 × 35 = 245/2520 - Likewise, for the 2nd fraction, since 70 × 36 = 2520,
25/70 = 25 × 36/70 × 36 = 900/2520 - Subtract the two like fractions:
245/2520 - 900/2520 = 245 - 900/2520 = -655/2520 - After reducing the fraction, the answer is -131/504
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 14/72-25/70 7/72-50/70 21/72-25/70 7/72-75/70 35/72-25/70 49/72-25/70