Add 90/70 and 12/10
1st number: 1 20/70, 2nd number: 1 2/10
90/70 + 12/10 is 87/35.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 70 and 10 is 70
Next, find the equivalent fraction of both fractional numbers with denominator 70 - For the 1st fraction, since 70 × 1 = 70,
90/70 = 90 × 1/70 × 1 = 90/70 - Likewise, for the 2nd fraction, since 10 × 7 = 70,
12/10 = 12 × 7/10 × 7 = 84/70 - Add the two like fractions:
90/70 + 84/70 = 90 + 84/70 = 174/70 - 174/70 simplified gives 87/35
- So, 90/70 + 12/10 = 87/35
In mixed form: 217/35
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/70+24/10 90/70+12/20 90/70+36/10 90/70+12/30 90/70+60/10 90/70+12/50 90/70+84/10 90/70+12/70