Add 18/84 and 54/40
1st number: 18/84, 2nd number: 1 14/40
18/84 + 54/40 is 219/140.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 84 and 40 is 840
Next, find the equivalent fraction of both fractional numbers with denominator 840 - For the 1st fraction, since 84 × 10 = 840,
18/84 = 18 × 10/84 × 10 = 180/840 - Likewise, for the 2nd fraction, since 40 × 21 = 840,
54/40 = 54 × 21/40 × 21 = 1134/840 - Add the two like fractions:
180/840 + 1134/840 = 180 + 1134/840 = 1314/840 - 1314/840 simplified gives 219/140
- So, 18/84 + 54/40 = 219/140
In mixed form: 179/140
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 36/84+54/40 18/84+54/80 54/84+54/40 90/84+54/40