Add 84/14 and 42/20
1st number: 6 0/14, 2nd number: 2 2/20
84/14 + 42/20 is 81/10.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 14 and 20 is 140
Next, find the equivalent fraction of both fractional numbers with denominator 140 - For the 1st fraction, since 14 × 10 = 140,
84/14 = 84 × 10/14 × 10 = 840/140 - Likewise, for the 2nd fraction, since 20 × 7 = 140,
42/20 = 42 × 7/20 × 7 = 294/140 - Add the two like fractions:
840/140 + 294/140 = 840 + 294/140 = 1134/140 - 1134/140 simplified gives 81/10
- So, 84/14 + 42/20 = 81/10
In mixed form: 81/10
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/14+84/20 84/28+42/20 84/14+42/40 84/42+42/20 84/14+42/60 84/70+42/20 84/98+42/20