Subtract 15/70 from 1/72
1/72 - 15/70 is -101/504.
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,
1/72 = 1 × 35/72 × 35 = 35/2520 - Likewise, for the 2nd fraction, since 70 × 36 = 2520,
15/70 = 15 × 36/70 × 36 = 540/2520 - Subtract the two like fractions:
35/2520 - 540/2520 = 35 - 540/2520 = -505/2520 - After reducing the fraction, the answer is -101/504
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 2/72-15/70 1/72-30/70 3/72-15/70 1/72-45/70 5/72-15/70 1/72-75/70 7/72-15/70