Add 2/42 and 81/40
1st number: 2/42, 2nd number: 2 1/40
2/42 + 81/40 is 1741/840.
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,
2/42 = 2 × 20/42 × 20 = 40/840 - Likewise, for the 2nd fraction, since 40 × 21 = 840,
81/40 = 81 × 21/40 × 21 = 1701/840 - Add the two like fractions:
40/840 + 1701/840 = 40 + 1701/840 = 1741/840 - So, 2/42 + 81/40 = 1741/840
In mixed form: 261/840
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 4/42+81/40 2/84+81/40 2/42+81/80 6/42+81/40 10/42+81/40 14/42+81/40