Add 20/84 and 42/8
1st number: 20/84, 2nd number: 5 2/8
20/84 + 42/8 is 461/84.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 84 and 8 is 168
Next, find the equivalent fraction of both fractional numbers with denominator 168 - For the 1st fraction, since 84 × 2 = 168,
20/84 = 20 × 2/84 × 2 = 40/168 - Likewise, for the 2nd fraction, since 8 × 21 = 168,
42/8 = 42 × 21/8 × 21 = 882/168 - Add the two like fractions:
40/168 + 882/168 = 40 + 882/168 = 922/168 - 922/168 simplified gives 461/84
- So, 20/84 + 42/8 = 461/84
In mixed form: 541/84
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/84+42/8 20/84+84/8 20/84+42/16 60/84+42/8 20/84+42/24 20/84+42/40 20/84+42/56