Add 80/84 and 1/21
80/84 + 1/21 is 1/1.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 84 and 21 is 84
Next, find the equivalent fraction of both fractional numbers with denominator 84 - For the 1st fraction, since 84 × 1 = 84,
80/84 = 80 × 1/84 × 1 = 80/84 - Likewise, for the 2nd fraction, since 21 × 4 = 84,
1/21 = 1 × 4/21 × 4 = 4/84 - Add the two like fractions:
80/84 + 4/84 = 80 + 4/84 = 84/84 - 84/84 simplified gives 1/1
- So, 80/84 + 1/21 = 1/1
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 80/84+2/21 80/84+1/42 80/84+3/21 80/84+1/63 80/84+5/21 80/84+7/21