Add 18/84 and 54/20
1st number: 18/84, 2nd number: 2 14/20
18/84 + 54/20 is 102/35.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 84 and 20 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 84 × 5 = 420,
18/84 = 18 × 5/84 × 5 = 90/420 - Likewise, for the 2nd fraction, since 20 × 21 = 420,
54/20 = 54 × 21/20 × 21 = 1134/420 - Add the two like fractions:
90/420 + 1134/420 = 90 + 1134/420 = 1224/420 - 1224/420 simplified gives 102/35
- So, 18/84 + 54/20 = 102/35
In mixed form: 232/35
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 36/84+54/20 18/84+54/40 54/84+54/20 18/84+54/60 90/84+54/20