Subtract 30/72 from 5/84
5/84 - 30/72 is -5/14.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 84 and 72 is 504
Next, find the equivalent fraction of both fractional numbers with denominator 504 - For the 1st fraction, since 84 × 6 = 504,
5/84 = 5 × 6/84 × 6 = 30/504 - Likewise, for the 2nd fraction, since 72 × 7 = 504,
30/72 = 30 × 7/72 × 7 = 210/504 - Subtract the two like fractions:
30/504 - 210/504 = 30 - 210/504 = -180/504 - After reducing the fraction, the answer is -5/14
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 10/84-30/72 5/84-60/72 15/84-30/72 5/84-90/72 25/84-30/72 35/84-30/72