Subtract 45/35 from 21/15
1st number: 1 6/15, 2nd number: 1 10/35
21/15 - 45/35 is 4/35.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 15 and 35 is 105
Next, find the equivalent fraction of both fractional numbers with denominator 105 - For the 1st fraction, since 15 × 7 = 105,
21/15 = 21 × 7/15 × 7 = 147/105 - Likewise, for the 2nd fraction, since 35 × 3 = 105,
45/35 = 45 × 3/35 × 3 = 135/105 - Subtract the two like fractions:
147/105 - 135/105 = 147 - 135/105 = 12/105 - After reducing the fraction, the answer is 4/35
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/15-45/35 21/15-90/35 21/30-45/35 21/15-45/70 63/15-45/35 21/45-45/35 21/75-45/35