Add 90/28 and 2/12
1st number: 3 6/28, 2nd number: 2/12
90/28 + 2/12 is 71/21.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 28 and 12 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 12 × 7 = 84,
2/12 = 2 × 7/12 × 7 = 14/84 - Add the two like fractions:
270/84 + 14/84 = 270 + 14/84 = 284/84 - 284/84 simplified gives 71/21
- So, 90/28 + 2/12 = 71/21
In mixed form: 38/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/28+4/12 90/56+2/12 90/28+2/24 90/28+6/12 90/84+2/12 90/28+2/36 90/28+10/12 90/28+2/60 90/28+14/12 90/28+2/84