Add 54/21 and 1/7
1st number: 2 12/21, 2nd number: 1/7
54/21 + 1/7 is 19/7.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 7 is 21
Next, find the equivalent fraction of both fractional numbers with denominator 21 - For the 1st fraction, since 21 × 1 = 21,
54/21 = 54 × 1/21 × 1 = 54/21 - Likewise, for the 2nd fraction, since 7 × 3 = 21,
1/7 = 1 × 3/7 × 3 = 3/21 - Add the two like fractions:
54/21 + 3/21 = 54 + 3/21 = 57/21 - 57/21 simplified gives 19/7
- So, 54/21 + 1/7 = 19/7
In mixed form: 25/7
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 54/21+2/7 54/42+1/7 54/21+1/14 54/21+3/7 54/63+1/7 54/21+1/21 54/21+5/7 54/21+1/35 54/21+1/49