Add 60/21 and 80/45
1st number: 2 18/21, 2nd number: 1 35/45
60/21 + 80/45 is 292/63.
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,
60/21 = 60 × 15/21 × 15 = 900/315 - Likewise, for the 2nd fraction, since 45 × 7 = 315,
80/45 = 80 × 7/45 × 7 = 560/315 - Add the two like fractions:
900/315 + 560/315 = 900 + 560/315 = 1460/315 - 1460/315 simplified gives 292/63
- So, 60/21 + 80/45 = 292/63
In mixed form: 440/63
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 60/42+80/45 60/21+80/90 60/63+80/45