Add 10/42 and 4/20
10/42 + 4/20 is 46/105.
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,
10/42 = 10 × 10/42 × 10 = 100/420 - Likewise, for the 2nd fraction, since 20 × 21 = 420,
4/20 = 4 × 21/20 × 21 = 84/420 - Add the two like fractions:
100/420 + 84/420 = 100 + 84/420 = 184/420 - 184/420 simplified gives 46/105
- So, 10/42 + 4/20 = 46/105
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 20/42+4/20 10/42+8/20 10/84+4/20 10/42+4/40 30/42+4/20 10/42+12/20 10/42+4/60 50/42+4/20 70/42+4/20 10/42+28/20