Add 20/21 and 5/60
20/21 + 5/60 is 29/28.
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,
20/21 = 20 × 20/21 × 20 = 400/420 - Likewise, for the 2nd fraction, since 60 × 7 = 420,
5/60 = 5 × 7/60 × 7 = 35/420 - Add the two like fractions:
400/420 + 35/420 = 400 + 35/420 = 435/420 - 435/420 simplified gives 29/28
- So, 20/21 + 5/60 = 29/28
In mixed form: 11/28
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/21+5/60 20/21+10/60 20/42+5/60 60/21+5/60 20/21+15/60 20/63+5/60 20/21+25/60 20/21+35/60