Add 12/28 and 84/40
1st number: 12/28, 2nd number: 2 4/40
12/28 + 84/40 is 177/70.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 28 and 40 is 280
Next, find the equivalent fraction of both fractional numbers with denominator 280 - For the 1st fraction, since 28 × 10 = 280,
12/28 = 12 × 10/28 × 10 = 120/280 - Likewise, for the 2nd fraction, since 40 × 7 = 280,
84/40 = 84 × 7/40 × 7 = 588/280 - Add the two like fractions:
120/280 + 588/280 = 120 + 588/280 = 708/280 - 708/280 simplified gives 177/70
- So, 12/28 + 84/40 = 177/70
In mixed form: 237/70
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 24/28+84/40 12/56+84/40 12/28+84/80 36/28+84/40 12/84+84/40 60/28+84/40 84/28+84/40