Subtract 63/7 from 72/30
1st number: 2 12/30, 2nd number: 9 0/7
72/30 - 63/7 is -33/5.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 30 and 7 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 30 × 7 = 210,
72/30 = 72 × 7/30 × 7 = 504/210 - Likewise, for the 2nd fraction, since 7 × 30 = 210,
63/7 = 63 × 30/7 × 30 = 1890/210 - Subtract the two like fractions:
504/210 - 1890/210 = 504 - 1890/210 = -1386/210 - After reducing the fraction, the answer is -33/5
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 72/60-63/7 72/30-63/14 72/90-63/7 72/30-63/21 72/30-63/35 72/30-63/49