Subtract 4/84 from 30/72
30/72 - 4/84 is 31/84.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 72 and 84 is 504
Next, find the equivalent fraction of both fractional numbers with denominator 504 - For the 1st fraction, since 72 × 7 = 504,
30/72 = 30 × 7/72 × 7 = 210/504 - Likewise, for the 2nd fraction, since 84 × 6 = 504,
4/84 = 4 × 6/84 × 6 = 24/504 - Subtract the two like fractions:
210/504 - 24/504 = 210 - 24/504 = 186/504 - After reducing the fraction, the answer is 31/84
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 60/72-4/84 30/72-8/84 90/72-4/84 30/72-12/84 30/72-20/84 30/72-28/84