Add 90/4 and 21/84
1st number: 22 2/4, 2nd number: 21/84
90/4 + 21/84 is 91/4.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 4 and 84 is 84
Next, find the equivalent fraction of both fractional numbers with denominator 84 - For the 1st fraction, since 4 × 21 = 84,
90/4 = 90 × 21/4 × 21 = 1890/84 - Likewise, for the 2nd fraction, since 84 × 1 = 84,
21/84 = 21 × 1/84 × 1 = 21/84 - Add the two like fractions:
1890/84 + 21/84 = 1890 + 21/84 = 1911/84 - 1911/84 simplified gives 91/4
- So, 90/4 + 21/84 = 91/4
In mixed form: 223/4
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/4+42/84 90/8+21/84 90/4+63/84 90/12+21/84 90/20+21/84 90/28+21/84