Add 90/42 and 21/27
1st number: 2 6/42, 2nd number: 21/27
90/42 + 21/27 is 184/63.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 27 is 378
Next, find the equivalent fraction of both fractional numbers with denominator 378 - For the 1st fraction, since 42 × 9 = 378,
90/42 = 90 × 9/42 × 9 = 810/378 - Likewise, for the 2nd fraction, since 27 × 14 = 378,
21/27 = 21 × 14/27 × 14 = 294/378 - Add the two like fractions:
810/378 + 294/378 = 810 + 294/378 = 1104/378 - 1104/378 simplified gives 184/63
- So, 90/42 + 21/27 = 184/63
In mixed form: 258/63
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/42+42/27 90/84+21/27 90/42+21/54 90/42+63/27 90/42+21/81