Add 21/30 and 54/28
1st number: 21/30, 2nd number: 1 26/28
21/30 + 54/28 is 92/35.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 30 and 28 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 30 × 14 = 420,
21/30 = 21 × 14/30 × 14 = 294/420 - Likewise, for the 2nd fraction, since 28 × 15 = 420,
54/28 = 54 × 15/28 × 15 = 810/420 - Add the two like fractions:
294/420 + 810/420 = 294 + 810/420 = 1104/420 - 1104/420 simplified gives 92/35
- So, 21/30 + 54/28 = 92/35
In mixed form: 222/35
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/30+54/28 21/60+54/28 21/30+54/56 63/30+54/28 21/90+54/28 21/30+54/84