Add 1/21 and 45/60
1/21 + 45/60 is 67/84.
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,
1/21 = 1 × 20/21 × 20 = 20/420 - Likewise, for the 2nd fraction, since 60 × 7 = 420,
45/60 = 45 × 7/60 × 7 = 315/420 - Add the two like fractions:
20/420 + 315/420 = 20 + 315/420 = 335/420 - 335/420 simplified gives 67/84
- So, 1/21 + 45/60 = 67/84
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 2/21+45/60 1/21+90/60 1/42+45/60 3/21+45/60 1/63+45/60 5/21+45/60 7/21+45/60