Add 90/70 and 6/84
1st number: 1 20/70, 2nd number: 6/84
90/70 + 6/84 is 19/14.
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,
90/70 = 90 × 6/70 × 6 = 540/420 - Likewise, for the 2nd fraction, since 84 × 5 = 420,
6/84 = 6 × 5/84 × 5 = 30/420 - Add the two like fractions:
540/420 + 30/420 = 540 + 30/420 = 570/420 - 570/420 simplified gives 19/14
- So, 90/70 + 6/84 = 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: 90/70+12/84 90/70+18/84 90/70+30/84 90/70+42/84