Add 84/20 and 42/7
1st number: 4 4/20, 2nd number: 6 0/7
84/20 + 42/7 is 51/5.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 7 is 140
Next, find the equivalent fraction of both fractional numbers with denominator 140 - For the 1st fraction, since 20 × 7 = 140,
84/20 = 84 × 7/20 × 7 = 588/140 - Likewise, for the 2nd fraction, since 7 × 20 = 140,
42/7 = 42 × 20/7 × 20 = 840/140 - Add the two like fractions:
588/140 + 840/140 = 588 + 840/140 = 1428/140 - 1428/140 simplified gives 51/5
- So, 84/20 + 42/7 = 51/5
In mixed form: 101/5
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/20+84/7 84/40+42/7 84/20+42/14 84/60+42/7 84/20+42/21 84/20+42/35 84/20+42/49