Subtract 9/45 from 24/21
1st number: 1 3/21, 2nd number: 9/45
24/21 - 9/45 is 33/35.
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,
9/45 = 9 × 7/45 × 7 = 63/315 - Subtract the two like fractions:
360/315 - 63/315 = 360 - 63/315 = 297/315 - After reducing the fraction, the answer is 33/35
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 48/21-9/45 24/21-18/45 24/42-9/45 24/21-9/90 72/21-9/45 24/21-27/45 24/63-9/45 24/21-63/45