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