Add 90/70 and 1/12
1st number: 1 20/70, 2nd number: 1/12
90/70 + 1/12 is 115/84.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 70 and 12 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 12 × 35 = 420,
1/12 = 1 × 35/12 × 35 = 35/420 - Add the two like fractions:
540/420 + 35/420 = 540 + 35/420 = 575/420 - 575/420 simplified gives 115/84
- So, 90/70 + 1/12 = 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: 90/70+2/12 90/70+1/24 90/70+3/12 90/70+1/36 90/70+5/12 90/70+1/60 90/70+7/12 90/70+1/84