Add 8/40 and 42/28
1st number: 8/40, 2nd number: 1 14/28
8/40 + 42/28 is 17/10.
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,
8/40 = 8 × 7/40 × 7 = 56/280 - Likewise, for the 2nd fraction, since 28 × 10 = 280,
42/28 = 42 × 10/28 × 10 = 420/280 - Add the two like fractions:
56/280 + 420/280 = 56 + 420/280 = 476/280 - 476/280 simplified gives 17/10
- So, 8/40 + 42/28 = 17/10
In mixed form: 17/10
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 16/40+42/28 8/40+84/28 8/80+42/28 8/40+42/56 24/40+42/28 8/40+42/84 56/40+42/28