Subtract 16/15 from 75/21
1st number: 3 12/21, 2nd number: 1 1/15
75/21 - 16/15 is 263/105.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 15 is 105
Next, find the equivalent fraction of both fractional numbers with denominator 105 - For the 1st fraction, since 21 × 5 = 105,
75/21 = 75 × 5/21 × 5 = 375/105 - Likewise, for the 2nd fraction, since 15 × 7 = 105,
16/15 = 16 × 7/15 × 7 = 112/105 - Subtract the two like fractions:
375/105 - 112/105 = 375 - 112/105 = 263/105 - In mixed form: 253/105
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 75/21-32/15 75/42-16/15 75/21-16/30 75/21-48/15 75/63-16/15 75/21-16/45 75/21-80/15 75/21-16/75