Subtract 50/72 from 1/21
1/21 - 50/72 is -163/252.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 72 is 504
Next, find the equivalent fraction of both fractional numbers with denominator 504 - For the 1st fraction, since 21 × 24 = 504,
1/21 = 1 × 24/21 × 24 = 24/504 - Likewise, for the 2nd fraction, since 72 × 7 = 504,
50/72 = 50 × 7/72 × 7 = 350/504 - Subtract the two like fractions:
24/504 - 350/504 = 24 - 350/504 = -326/504 - After reducing the fraction, the answer is -163/252
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 2/21-50/72 1/42-50/72 3/21-50/72 1/63-50/72 5/21-50/72 7/21-50/72