Add 15/21 and 16/45
15/21 + 16/45 is 337/315.
Steps for adding 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,
15/21 = 15 × 15/21 × 15 = 225/315 - Likewise, for the 2nd fraction, since 45 × 7 = 315,
16/45 = 16 × 7/45 × 7 = 112/315 - Add the two like fractions:
225/315 + 112/315 = 225 + 112/315 = 337/315 - So, 15/21 + 16/45 = 337/315
In mixed form: 122/315
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 30/21+16/45 15/21+32/45 15/42+16/45 15/21+16/90 45/21+16/45 15/21+48/45 15/63+16/45 75/21+16/45 15/21+80/45