Add 54/84 and 81/30
1st number: 54/84, 2nd number: 2 21/30
54/84 + 81/30 is 117/35.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 84 and 30 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 84 × 5 = 420,
54/84 = 54 × 5/84 × 5 = 270/420 - Likewise, for the 2nd fraction, since 30 × 14 = 420,
81/30 = 81 × 14/30 × 14 = 1134/420 - Add the two like fractions:
270/420 + 1134/420 = 270 + 1134/420 = 1404/420 - 1404/420 simplified gives 117/35
- So, 54/84 + 81/30 = 117/35
In mixed form: 312/35
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 54/84+81/60 54/84+81/90