Add 15/30 and 45/84
15/30 + 45/84 is 29/28.
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,
45/84 = 45 × 5/84 × 5 = 225/420 - Add the two like fractions:
210/420 + 225/420 = 210 + 225/420 = 435/420 - 435/420 simplified gives 29/28
- So, 15/30 + 45/84 = 29/28
In mixed form: 11/28
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 15/30+90/84 15/60+45/84 45/30+45/84 15/90+45/84 75/30+45/84