Add 56/90 and 63/42
1st number: 56/90, 2nd number: 1 21/42
56/90 + 63/42 is 191/90.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 90 and 42 is 630
Next, find the equivalent fraction of both fractional numbers with denominator 630 - For the 1st fraction, since 90 × 7 = 630,
56/90 = 56 × 7/90 × 7 = 392/630 - Likewise, for the 2nd fraction, since 42 × 15 = 630,
63/42 = 63 × 15/42 × 15 = 945/630 - Add the two like fractions:
392/630 + 945/630 = 392 + 945/630 = 1337/630 - 1337/630 simplified gives 191/90
- So, 56/90 + 63/42 = 191/90
In mixed form: 211/90
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 56/90+63/84