Add 90/84 and 12/10
1st number: 1 6/84, 2nd number: 1 2/10
90/84 + 12/10 is 159/70.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 84 and 10 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 84 × 5 = 420,
90/84 = 90 × 5/84 × 5 = 450/420 - Likewise, for the 2nd fraction, since 10 × 42 = 420,
12/10 = 12 × 42/10 × 42 = 504/420 - Add the two like fractions:
450/420 + 504/420 = 450 + 504/420 = 954/420 - 954/420 simplified gives 159/70
- So, 90/84 + 12/10 = 159/70
In mixed form: 219/70
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/84+24/10 90/84+12/20 90/84+36/10 90/84+12/30 90/84+60/10 90/84+12/50 90/84+84/10 90/84+12/70