Add 90/56 and 42/20
1st number: 1 34/56, 2nd number: 2 2/20
90/56 + 42/20 is 519/140.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 56 and 20 is 280
Next, find the equivalent fraction of both fractional numbers with denominator 280 - For the 1st fraction, since 56 × 5 = 280,
90/56 = 90 × 5/56 × 5 = 450/280 - Likewise, for the 2nd fraction, since 20 × 14 = 280,
42/20 = 42 × 14/20 × 14 = 588/280 - Add the two like fractions:
450/280 + 588/280 = 450 + 588/280 = 1038/280 - 1038/280 simplified gives 519/140
- So, 90/56 + 42/20 = 519/140
In mixed form: 399/140
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/56+84/20 90/56+42/40 90/56+42/60