Add 70/12 and 90/70
1st number: 5 10/12, 2nd number: 1 20/70
70/12 + 90/70 is 299/42.
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,
70/12 = 70 × 35/12 × 35 = 2450/420 - Likewise, for the 2nd fraction, since 70 × 6 = 420,
90/70 = 90 × 6/70 × 6 = 540/420 - Add the two like fractions:
2450/420 + 540/420 = 2450 + 540/420 = 2990/420 - 2990/420 simplified gives 299/42
- So, 70/12 + 90/70 = 299/42
In mixed form: 75/42
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 70/24+90/70 70/36+90/70 70/60+90/70 70/84+90/70