Add 54/60 and 10/21
54/60 + 10/21 is 289/210.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 60 and 21 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 60 × 7 = 420,
54/60 = 54 × 7/60 × 7 = 378/420 - Likewise, for the 2nd fraction, since 21 × 20 = 420,
10/21 = 10 × 20/21 × 20 = 200/420 - Add the two like fractions:
378/420 + 200/420 = 378 + 200/420 = 578/420 - 578/420 simplified gives 289/210
- So, 54/60 + 10/21 = 289/210
In mixed form: 179/210
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 54/60+20/21 54/60+10/42 54/60+30/21 54/60+10/63 54/60+50/21 54/60+70/21