Add 20/42 and 42/10
1st number: 20/42, 2nd number: 4 2/10
20/42 + 42/10 is 491/105.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 10 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 42 × 5 = 210,
20/42 = 20 × 5/42 × 5 = 100/210 - Likewise, for the 2nd fraction, since 10 × 21 = 210,
42/10 = 42 × 21/10 × 21 = 882/210 - Add the two like fractions:
100/210 + 882/210 = 100 + 882/210 = 982/210 - 982/210 simplified gives 491/105
- So, 20/42 + 42/10 = 491/105
In mixed form: 471/105
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/42+42/10 20/42+84/10 20/84+42/10 20/42+42/20 60/42+42/10 20/42+42/30 20/42+42/50 20/42+42/70