Add 7/84 and 90/70
1st number: 7/84, 2nd number: 1 20/70
7/84 + 90/70 is 115/84.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 84 and 70 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 84 × 5 = 420,
7/84 = 7 × 5/84 × 5 = 35/420 - Likewise, for the 2nd fraction, since 70 × 6 = 420,
90/70 = 90 × 6/70 × 6 = 540/420 - Add the two like fractions:
35/420 + 540/420 = 35 + 540/420 = 575/420 - 575/420 simplified gives 115/84
- So, 7/84 + 90/70 = 115/84
In mixed form: 131/84
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 14/84+90/70 21/84+90/70 35/84+90/70 49/84+90/70