Add 8/28 and 90/42
1st number: 8/28, 2nd number: 2 6/42
8/28 + 90/42 is 17/7.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 28 and 42 is 84
Next, find the equivalent fraction of both fractional numbers with denominator 84 - For the 1st fraction, since 28 × 3 = 84,
8/28 = 8 × 3/28 × 3 = 24/84 - Likewise, for the 2nd fraction, since 42 × 2 = 84,
90/42 = 90 × 2/42 × 2 = 180/84 - Add the two like fractions:
24/84 + 180/84 = 24 + 180/84 = 204/84 - 204/84 simplified gives 17/7
- So, 8/28 + 90/42 = 17/7
In mixed form: 23/7
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 16/28+90/42 8/56+90/42 8/28+90/84 24/28+90/42 8/84+90/42 40/28+90/42 56/28+90/42