Add 90/28 and 90/84
1st number: 3 6/28, 2nd number: 1 6/84
90/28 + 90/84 is 30/7.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 28 and 84 is 84
Next, find the equivalent fraction of both fractional numbers with denominator 84 - For the 1st fraction, since 28 × 3 = 84,
90/28 = 90 × 3/28 × 3 = 270/84 - Likewise, for the 2nd fraction, since 84 × 1 = 84,
90/84 = 90 × 1/84 × 1 = 90/84 - Add the two like fractions:
270/84 + 90/84 = 270 + 90/84 = 360/84 - 360/84 simplified gives 30/7
- So, 90/28 + 90/84 = 30/7
In mixed form: 42/7
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/56+90/84 90/84+90/84