Add 90/56 and 20/42
1st number: 1 34/56, 2nd number: 20/42
90/56 + 20/42 is 25/12.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 56 and 42 is 168
Next, find the equivalent fraction of both fractional numbers with denominator 168 - For the 1st fraction, since 56 × 3 = 168,
90/56 = 90 × 3/56 × 3 = 270/168 - Likewise, for the 2nd fraction, since 42 × 4 = 168,
20/42 = 20 × 4/42 × 4 = 80/168 - Add the two like fractions:
270/168 + 80/168 = 270 + 80/168 = 350/168 - 350/168 simplified gives 25/12
- So, 90/56 + 20/42 = 25/12
In mixed form: 21/12
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/56+40/42 90/56+20/84 90/56+60/42