Add 21/28 and 54/10
1st number: 21/28, 2nd number: 5 4/10
21/28 + 54/10 is 123/20.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 28 and 10 is 140
Next, find the equivalent fraction of both fractional numbers with denominator 140 - For the 1st fraction, since 28 × 5 = 140,
21/28 = 21 × 5/28 × 5 = 105/140 - Likewise, for the 2nd fraction, since 10 × 14 = 140,
54/10 = 54 × 14/10 × 14 = 756/140 - Add the two like fractions:
105/140 + 756/140 = 105 + 756/140 = 861/140 - 861/140 simplified gives 123/20
- So, 21/28 + 54/10 = 123/20
In mixed form: 63/20
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/28+54/10 21/56+54/10 21/28+54/20 63/28+54/10 21/84+54/10 21/28+54/30 21/28+54/50 21/28+54/70