Add 5/21 and 90/84
1st number: 5/21, 2nd number: 1 6/84
5/21 + 90/84 is 55/42.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 84 is 84
Next, find the equivalent fraction of both fractional numbers with denominator 84 - For the 1st fraction, since 21 × 4 = 84,
5/21 = 5 × 4/21 × 4 = 20/84 - Likewise, for the 2nd fraction, since 84 × 1 = 84,
90/84 = 90 × 1/84 × 1 = 90/84 - Add the two like fractions:
20/84 + 90/84 = 20 + 90/84 = 110/84 - 110/84 simplified gives 55/42
- So, 5/21 + 90/84 = 55/42
In mixed form: 113/42
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 10/21+90/84 5/42+90/84 15/21+90/84 5/63+90/84 25/21+90/84 35/21+90/84