Add 90/42 and 20/8
1st number: 2 6/42, 2nd number: 2 4/8
90/42 + 20/8 is 65/14.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 8 is 168
Next, find the equivalent fraction of both fractional numbers with denominator 168 - For the 1st fraction, since 42 × 4 = 168,
90/42 = 90 × 4/42 × 4 = 360/168 - Likewise, for the 2nd fraction, since 8 × 21 = 168,
20/8 = 20 × 21/8 × 21 = 420/168 - Add the two like fractions:
360/168 + 420/168 = 360 + 420/168 = 780/168 - 780/168 simplified gives 65/14
- So, 90/42 + 20/8 = 65/14
In mixed form: 49/14
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/42+40/8 90/84+20/8 90/42+20/16 90/42+60/8 90/42+20/24 90/42+20/40 90/42+20/56