Subtract 40/35 from 9/21
1st number: 9/21, 2nd number: 1 5/35
9/21 - 40/35 is -5/7.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 35 is 105
Next, find the equivalent fraction of both fractional numbers with denominator 105 - For the 1st fraction, since 21 × 5 = 105,
9/21 = 9 × 5/21 × 5 = 45/105 - Likewise, for the 2nd fraction, since 35 × 3 = 105,
40/35 = 40 × 3/35 × 3 = 120/105 - Subtract the two like fractions:
45/105 - 120/105 = 45 - 120/105 = -75/105 - After reducing the fraction, the answer is -5/7
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 18/21-40/35 9/21-80/35 9/42-40/35 9/21-40/70 27/21-40/35 9/63-40/35 45/21-40/35 63/21-40/35