Add 50/21 and 30/40
1st number: 2 8/21, 2nd number: 30/40
50/21 + 30/40 is 263/84.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 40 is 840
Next, find the equivalent fraction of both fractional numbers with denominator 840 - For the 1st fraction, since 21 × 40 = 840,
50/21 = 50 × 40/21 × 40 = 2000/840 - Likewise, for the 2nd fraction, since 40 × 21 = 840,
30/40 = 30 × 21/40 × 21 = 630/840 - Add the two like fractions:
2000/840 + 630/840 = 2000 + 630/840 = 2630/840 - 2630/840 simplified gives 263/84
- So, 50/21 + 30/40 = 263/84
In mixed form: 311/84
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 50/21+60/40 50/42+30/40 50/21+30/80 50/21+90/40 50/63+30/40