Add 50/21 and 72/45
1st number: 2 8/21, 2nd number: 1 27/45
50/21 + 72/45 is 418/105.
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,
50/21 = 50 × 15/21 × 15 = 750/315 - Likewise, for the 2nd fraction, since 45 × 7 = 315,
72/45 = 72 × 7/45 × 7 = 504/315 - Add the two like fractions:
750/315 + 504/315 = 750 + 504/315 = 1254/315 - 1254/315 simplified gives 418/105
- So, 50/21 + 72/45 = 418/105
In mixed form: 3103/105
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 50/42+72/45 50/21+72/90 50/63+72/45