Add 54/20 and 28/84
1st number: 2 14/20, 2nd number: 28/84
54/20 + 28/84 is 91/30.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 84 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 20 × 21 = 420,
54/20 = 54 × 21/20 × 21 = 1134/420 - Likewise, for the 2nd fraction, since 84 × 5 = 420,
28/84 = 28 × 5/84 × 5 = 140/420 - Add the two like fractions:
1134/420 + 140/420 = 1134 + 140/420 = 1274/420 - 1274/420 simplified gives 91/30
- So, 54/20 + 28/84 = 91/30
In mixed form: 31/30
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 54/20+56/84 54/40+28/84 54/60+28/84