Add 15/30 and 72/84
15/30 + 72/84 is 19/14.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 30 and 84 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 30 × 14 = 420,
15/30 = 15 × 14/30 × 14 = 210/420 - Likewise, for the 2nd fraction, since 84 × 5 = 420,
72/84 = 72 × 5/84 × 5 = 360/420 - Add the two like fractions:
210/420 + 360/420 = 210 + 360/420 = 570/420 - 570/420 simplified gives 19/14
- So, 15/30 + 72/84 = 19/14
In mixed form: 15/14
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 15/60+72/84 45/30+72/84 15/90+72/84 75/30+72/84