Add 1/84 and 7/20
1/84 + 7/20 is 38/105.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 84 and 20 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 84 × 5 = 420,
1/84 = 1 × 5/84 × 5 = 5/420 - Likewise, for the 2nd fraction, since 20 × 21 = 420,
7/20 = 7 × 21/20 × 21 = 147/420 - Add the two like fractions:
5/420 + 147/420 = 5 + 147/420 = 152/420 - 152/420 simplified gives 38/105
- So, 1/84 + 7/20 = 38/105
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 2/84+7/20 1/84+14/20 1/84+7/40 3/84+7/20 1/84+21/20 1/84+7/60 5/84+7/20 1/84+35/20 7/84+7/20 1/84+49/20