Subtract 2/7 from 30/72
30/72 - 2/7 is 11/84.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 72 and 7 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 7 × 72 = 504,
2/7 = 2 × 72/7 × 72 = 144/504 - Subtract the two like fractions:
210/504 - 144/504 = 210 - 144/504 = 66/504 - After reducing the fraction, the answer is 11/84
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 60/72-2/7 30/72-4/7 30/72-2/14 90/72-2/7 30/72-6/7 30/72-2/21 30/72-10/7 30/72-2/35 30/72-14/7 30/72-2/49