Subtract 54/21 from 63/30
1st number: 2 3/30, 2nd number: 2 12/21
63/30 - 54/21 is -33/70.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 30 and 21 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 30 × 7 = 210,
63/30 = 63 × 7/30 × 7 = 441/210 - Likewise, for the 2nd fraction, since 21 × 10 = 210,
54/21 = 54 × 10/21 × 10 = 540/210 - Subtract the two like fractions:
441/210 - 540/210 = 441 - 540/210 = -99/210 - After reducing the fraction, the answer is -33/70
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 63/60-54/21 63/30-54/42 63/90-54/21 63/30-54/63