Add 48/28 and 54/21
1st number: 1 20/28, 2nd number: 2 12/21
48/28 + 54/21 is 30/7.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 28 and 21 is 84
Next, find the equivalent fraction of both fractional numbers with denominator 84 - For the 1st fraction, since 28 × 3 = 84,
48/28 = 48 × 3/28 × 3 = 144/84 - Likewise, for the 2nd fraction, since 21 × 4 = 84,
54/21 = 54 × 4/21 × 4 = 216/84 - Add the two like fractions:
144/84 + 216/84 = 144 + 216/84 = 360/84 - 360/84 simplified gives 30/7
- So, 48/28 + 54/21 = 30/7
In mixed form: 42/7
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 96/28+54/21 48/56+54/21 48/28+54/42 48/84+54/21 48/28+54/63