Add 4/40 and 42/56
4/40 + 42/56 is 17/20.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 40 and 56 is 280
Next, find the equivalent fraction of both fractional numbers with denominator 280 - For the 1st fraction, since 40 × 7 = 280,
4/40 = 4 × 7/40 × 7 = 28/280 - Likewise, for the 2nd fraction, since 56 × 5 = 280,
42/56 = 42 × 5/56 × 5 = 210/280 - Add the two like fractions:
28/280 + 210/280 = 28 + 210/280 = 238/280 - 238/280 simplified gives 17/20
- So, 4/40 + 42/56 = 17/20
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 8/40+42/56 4/40+84/56 4/80+42/56 12/40+42/56 20/40+42/56 28/40+42/56