Subtract 1/30 from 45/21
1st number: 2 3/21, 2nd number: 1/30
45/21 - 1/30 is 443/210.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 30 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 21 × 10 = 210,
45/21 = 45 × 10/21 × 10 = 450/210 - Likewise, for the 2nd fraction, since 30 × 7 = 210,
1/30 = 1 × 7/30 × 7 = 7/210 - Subtract the two like fractions:
450/210 - 7/210 = 450 - 7/210 = 443/210 - In mixed form: 223/210
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/21-1/30 45/21-2/30 45/42-1/30 45/21-1/60 45/21-3/30 45/63-1/30 45/21-1/90 45/21-5/30 45/21-7/30