Add 42/40 and 12/28
1st number: 1 2/40, 2nd number: 12/28
42/40 + 12/28 is 207/140.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 40 and 28 is 280
Next, find the equivalent fraction of both fractional numbers with denominator 280 - For the 1st fraction, since 40 × 7 = 280,
42/40 = 42 × 7/40 × 7 = 294/280 - Likewise, for the 2nd fraction, since 28 × 10 = 280,
12/28 = 12 × 10/28 × 10 = 120/280 - Add the two like fractions:
294/280 + 120/280 = 294 + 120/280 = 414/280 - 414/280 simplified gives 207/140
- So, 42/40 + 12/28 = 207/140
In mixed form: 167/140
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/40+12/28 42/40+24/28 42/80+12/28 42/40+12/56 42/40+36/28 42/40+12/84 42/40+60/28 42/40+84/28