Add 42/20 and 18/42
1st number: 2 2/20, 2nd number: 18/42
42/20 + 18/42 is 177/70.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 42 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 20 × 21 = 420,
42/20 = 42 × 21/20 × 21 = 882/420 - Likewise, for the 2nd fraction, since 42 × 10 = 420,
18/42 = 18 × 10/42 × 10 = 180/420 - Add the two like fractions:
882/420 + 180/420 = 882 + 180/420 = 1062/420 - 1062/420 simplified gives 177/70
- So, 42/20 + 18/42 = 177/70
In mixed form: 237/70
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/20+18/42 42/20+36/42 42/40+18/42 42/20+18/84 42/20+54/42 42/60+18/42 42/20+90/42