Add 90/12 and 18/70
1st number: 7 6/12, 2nd number: 18/70
90/12 + 18/70 is 543/70.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 12 and 70 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 12 × 35 = 420,
90/12 = 90 × 35/12 × 35 = 3150/420 - Likewise, for the 2nd fraction, since 70 × 6 = 420,
18/70 = 18 × 6/70 × 6 = 108/420 - Add the two like fractions:
3150/420 + 108/420 = 3150 + 108/420 = 3258/420 - 3258/420 simplified gives 543/70
- So, 90/12 + 18/70 = 543/70
In mixed form: 753/70
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/12+36/70 90/24+18/70 90/12+54/70 90/36+18/70 90/12+90/70 90/60+18/70 90/84+18/70