Add 72/15 and 6/84, Solve 4 12/15 + 6/84 as a fraction

Add 72/15 and 6/84

1^st number: 4 12/15, 2^nd number: 6/84

72/15 + 6/84 is 341/70.

Find the least common denominator or LCM of the two denominators:
LCM of 15 and 84 is 420

Next, find the equivalent fraction of both fractional numbers with denominator 420
For the 1st fraction, since 15 × 28 = 420,
72/15 = 72 × 28/15 × 28 = 2016/420
Likewise, for the 2nd fraction, since 84 × 5 = 420,
6/84 = 6 × 5/84 × 5 = 30/420
Add the two like fractions:
2016/420 + 30/420 = 2016 + 30/420 = 2046/420
2046/420 simplified gives 341/70
So, 72/15 + 6/84 = 341/70
In mixed form: 461/70

MathStep (Works offline)

Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad