Add 9/21 and 40/60
9/21 + 40/60 is 23/21.
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,
9/21 = 9 × 20/21 × 20 = 180/420 - Likewise, for the 2nd fraction, since 60 × 7 = 420,
40/60 = 40 × 7/60 × 7 = 280/420 - Add the two like fractions:
180/420 + 280/420 = 180 + 280/420 = 460/420 - 460/420 simplified gives 23/21
- So, 9/21 + 40/60 = 23/21
In mixed form: 12/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 18/21+40/60 9/21+80/60 9/42+40/60 27/21+40/60 9/63+40/60 45/21+40/60 63/21+40/60