Add 75/15 and 16/21
1st number: 5 0/15, 2nd number: 16/21
75/15 + 16/21 is 121/21.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 15 and 21 is 105
Next, find the equivalent fraction of both fractional numbers with denominator 105 - For the 1st fraction, since 15 × 7 = 105,
75/15 = 75 × 7/15 × 7 = 525/105 - Likewise, for the 2nd fraction, since 21 × 5 = 105,
16/21 = 16 × 5/21 × 5 = 80/105 - Add the two like fractions:
525/105 + 80/105 = 525 + 80/105 = 605/105 - 605/105 simplified gives 121/21
- So, 75/15 + 16/21 = 121/21
In mixed form: 516/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 75/15+32/21 75/30+16/21 75/15+16/42 75/15+48/21 75/45+16/21 75/15+16/63 75/15+80/21