Add 42/21 and 80/9
1st number: 2 0/21, 2nd number: 8 8/9
42/21 + 80/9 is 98/9.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 9 is 63
Next, find the equivalent fraction of both fractional numbers with denominator 63 - For the 1st fraction, since 21 × 3 = 63,
42/21 = 42 × 3/21 × 3 = 126/63 - Likewise, for the 2nd fraction, since 9 × 7 = 63,
80/9 = 80 × 7/9 × 7 = 560/63 - Add the two like fractions:
126/63 + 560/63 = 126 + 560/63 = 686/63 - 686/63 simplified gives 98/9
- So, 42/21 + 80/9 = 98/9
In mixed form: 108/9
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/21+80/9 42/21+80/18 42/63+80/9 42/21+80/27 42/21+80/45 42/21+80/63