Add 18/70 and 80/84
18/70 + 80/84 is 127/105.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 70 and 84 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 70 × 6 = 420,
18/70 = 18 × 6/70 × 6 = 108/420 - Likewise, for the 2nd fraction, since 84 × 5 = 420,
80/84 = 80 × 5/84 × 5 = 400/420 - Add the two like fractions:
108/420 + 400/420 = 108 + 400/420 = 508/420 - 508/420 simplified gives 127/105
- So, 18/70 + 80/84 = 127/105
In mixed form: 122/105
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 36/70+80/84 54/70+80/84 90/70+80/84