Add 12/84 and 90/35
1st number: 12/84, 2nd number: 2 20/35
12/84 + 90/35 is 19/7.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 84 and 35 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 84 × 5 = 420,
12/84 = 12 × 5/84 × 5 = 60/420 - Likewise, for the 2nd fraction, since 35 × 12 = 420,
90/35 = 90 × 12/35 × 12 = 1080/420 - Add the two like fractions:
60/420 + 1080/420 = 60 + 1080/420 = 1140/420 - 1140/420 simplified gives 19/7
- So, 12/84 + 90/35 = 19/7
In mixed form: 25/7
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 24/84+90/35 12/84+90/70 36/84+90/35 60/84+90/35