Add 72/20 and 6/84
1st number: 3 12/20, 2nd number: 6/84
72/20 + 6/84 is 257/70.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 84 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 20 × 21 = 420,
72/20 = 72 × 21/20 × 21 = 1512/420 - Likewise, for the 2nd fraction, since 84 × 5 = 420,
6/84 = 6 × 5/84 × 5 = 30/420 - Add the two like fractions:
1512/420 + 30/420 = 1512 + 30/420 = 1542/420 - 1542/420 simplified gives 257/70
- So, 72/20 + 6/84 = 257/70
In mixed form: 347/70
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 72/20+12/84 72/40+6/84 72/20+18/84 72/60+6/84 72/20+30/84 72/20+42/84