Add 8/42 and 56/20
1st number: 8/42, 2nd number: 2 16/20
8/42 + 56/20 is 314/105.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 20 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 42 × 10 = 420,
8/42 = 8 × 10/42 × 10 = 80/420 - Likewise, for the 2nd fraction, since 20 × 21 = 420,
56/20 = 56 × 21/20 × 21 = 1176/420 - Add the two like fractions:
80/420 + 1176/420 = 80 + 1176/420 = 1256/420 - 1256/420 simplified gives 314/105
- So, 8/42 + 56/20 = 314/105
In mixed form: 2104/105
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 16/42+56/20 8/84+56/20 8/42+56/40 24/42+56/20 8/42+56/60 40/42+56/20 56/42+56/20