Subtract 1/45 from 24/21
1st number: 1 3/21, 2nd number: 1/45
24/21 - 1/45 is 353/315.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 45 is 315
Next, find the equivalent fraction of both fractional numbers with denominator 315 - For the 1st fraction, since 21 × 15 = 315,
24/21 = 24 × 15/21 × 15 = 360/315 - Likewise, for the 2nd fraction, since 45 × 7 = 315,
1/45 = 1 × 7/45 × 7 = 7/315 - Subtract the two like fractions:
360/315 - 7/315 = 360 - 7/315 = 353/315 - In mixed form: 138/315
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 48/21-1/45 24/21-2/45 24/42-1/45 24/21-1/90 72/21-1/45 24/21-3/45 24/63-1/45 24/21-5/45 24/21-7/45