Add 54/42 and 84/40
1st number: 1 12/42, 2nd number: 2 4/40
54/42 + 84/40 is 237/70.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 40 is 840
Next, find the equivalent fraction of both fractional numbers with denominator 840 - For the 1st fraction, since 42 × 20 = 840,
54/42 = 54 × 20/42 × 20 = 1080/840 - Likewise, for the 2nd fraction, since 40 × 21 = 840,
84/40 = 84 × 21/40 × 21 = 1764/840 - Add the two like fractions:
1080/840 + 1764/840 = 1080 + 1764/840 = 2844/840 - 2844/840 simplified gives 237/70
- So, 54/42 + 84/40 = 237/70
In mixed form: 327/70
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 54/84+84/40 54/42+84/80