Add 7/21 and 30/60
7/21 + 30/60 is 5/6.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 60 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 21 × 20 = 420,
7/21 = 7 × 20/21 × 20 = 140/420 - Likewise, for the 2nd fraction, since 60 × 7 = 420,
30/60 = 30 × 7/60 × 7 = 210/420 - Add the two like fractions:
140/420 + 210/420 = 140 + 210/420 = 350/420 - 350/420 simplified gives 5/6
- So, 7/21 + 30/60 = 5/6
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 14/21+30/60 7/42+30/60 7/21+90/60 7/63+30/60 35/21+30/60 49/21+30/60