Add 15/84 and 70/5
1st number: 15/84, 2nd number: 14 0/5
15/84 + 70/5 is 397/28.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 84 and 5 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 84 × 5 = 420,
15/84 = 15 × 5/84 × 5 = 75/420 - Likewise, for the 2nd fraction, since 5 × 84 = 420,
70/5 = 70 × 84/5 × 84 = 5880/420 - Add the two like fractions:
75/420 + 5880/420 = 75 + 5880/420 = 5955/420 - 5955/420 simplified gives 397/28
- So, 15/84 + 70/5 = 397/28
In mixed form: 145/28
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 30/84+70/5 15/84+70/10 45/84+70/5 15/84+70/15 75/84+70/5 15/84+70/25 15/84+70/35