Add 45/42 and 21/10
1st number: 1 3/42, 2nd number: 2 1/10
45/42 + 21/10 is 111/35.
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,
45/42 = 45 × 5/42 × 5 = 225/210 - Likewise, for the 2nd fraction, since 10 × 21 = 210,
21/10 = 21 × 21/10 × 21 = 441/210 - Add the two like fractions:
225/210 + 441/210 = 225 + 441/210 = 666/210 - 666/210 simplified gives 111/35
- So, 45/42 + 21/10 = 111/35
In mixed form: 36/35
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/42+21/10 45/42+42/10 45/84+21/10 45/42+21/20 45/42+63/10 45/42+21/30 45/42+21/50 45/42+21/70