Add 4/42 and 40/21
1st number: 4/42, 2nd number: 1 19/21
4/42 + 40/21 is 2/1.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 21 is 42
Next, find the equivalent fraction of both fractional numbers with denominator 42 - For the 1st fraction, since 42 × 1 = 42,
4/42 = 4 × 1/42 × 1 = 4/42 - Likewise, for the 2nd fraction, since 21 × 2 = 42,
40/21 = 40 × 2/21 × 2 = 80/42 - Add the two like fractions:
4/42 + 80/42 = 4 + 80/42 = 84/42 - 84/42 simplified gives 2/1
- So, 4/42 + 40/21 = 2/1
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 8/42+40/21 4/42+80/21 4/84+40/21 4/42+40/42 12/42+40/21 4/42+40/63 20/42+40/21 28/42+40/21