Add 2/42 and 80/40
1st number: 2/42, 2nd number: 2 0/40
2/42 + 80/40 is 43/21.
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,
80/40 = 80 × 21/40 × 21 = 1680/840 - Add the two like fractions:
40/840 + 1680/840 = 40 + 1680/840 = 1720/840 - 1720/840 simplified gives 43/21
- So, 2/42 + 80/40 = 43/21
In mixed form: 21/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 4/42+80/40 2/84+80/40 6/42+80/40 10/42+80/40 14/42+80/40