Add 54/84 and 3/5
54/84 + 3/5 is 87/70.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 84 and 5 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 5 × 84 = 420,
3/5 = 3 × 84/5 × 84 = 252/420 - Add the two like fractions:
270/420 + 252/420 = 270 + 252/420 = 522/420 - 522/420 simplified gives 87/70
- So, 54/84 + 3/5 = 87/70
In mixed form: 117/70
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 54/84+6/5 54/84+3/10 54/84+9/5 54/84+3/15 54/84+15/5 54/84+3/25 54/84+21/5 54/84+3/35