Add 21/60 and 54/7
1st number: 21/60, 2nd number: 7 5/7
21/60 + 54/7 is 1129/140.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 60 and 7 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 60 × 7 = 420,
21/60 = 21 × 7/60 × 7 = 147/420 - Likewise, for the 2nd fraction, since 7 × 60 = 420,
54/7 = 54 × 60/7 × 60 = 3240/420 - Add the two like fractions:
147/420 + 3240/420 = 147 + 3240/420 = 3387/420 - 3387/420 simplified gives 1129/140
- So, 21/60 + 54/7 = 1129/140
In mixed form: 89/140
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/60+54/7 21/60+54/14 63/60+54/7 21/60+54/21 21/60+54/35 21/60+54/49