Subtract 1/63 from 30/21
1st number: 1 9/21, 2nd number: 1/63
30/21 - 1/63 is 89/63.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 63 is 63
Next, find the equivalent fraction of both fractional numbers with denominator 63 - For the 1st fraction, since 21 × 3 = 63,
30/21 = 30 × 3/21 × 3 = 90/63 - Likewise, for the 2nd fraction, since 63 × 1 = 63,
1/63 = 1 × 1/63 × 1 = 1/63 - Subtract the two like fractions:
90/63 - 1/63 = 90 - 1/63 = 89/63 - In mixed form: 126/63
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 60/21-1/63 30/21-2/63 30/42-1/63 90/21-1/63 30/21-3/63 30/63-1/63 30/21-5/63 30/21-7/63