Subtract 3/42 from 10/72
10/72 - 3/42 is 17/252.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 72 and 42 is 504
Next, find the equivalent fraction of both fractional numbers with denominator 504 - For the 1st fraction, since 72 × 7 = 504,
10/72 = 10 × 7/72 × 7 = 70/504 - Likewise, for the 2nd fraction, since 42 × 12 = 504,
3/42 = 3 × 12/42 × 12 = 36/504 - Subtract the two like fractions:
70/504 - 36/504 = 70 - 36/504 = 34/504 - After reducing the fraction, the answer is 17/252
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 20/72-3/42 10/72-6/42 10/72-3/84 30/72-3/42 10/72-9/42 50/72-3/42 10/72-15/42 70/72-3/42 10/72-21/42