Add 42/30 and 21/10
1st number: 1 12/30, 2nd number: 2 1/10
42/30 + 21/10 is 7/2.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 30 and 10 is 30
Next, find the equivalent fraction of both fractional numbers with denominator 30 - For the 1st fraction, since 30 × 1 = 30,
42/30 = 42 × 1/30 × 1 = 42/30 - Likewise, for the 2nd fraction, since 10 × 3 = 30,
21/10 = 21 × 3/10 × 3 = 63/30 - Add the two like fractions:
42/30 + 63/30 = 42 + 63/30 = 105/30 - 105/30 simplified gives 7/2
- So, 42/30 + 21/10 = 7/2
In mixed form: 31/2
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/30+21/10 42/30+42/10 42/60+21/10 42/30+21/20 42/30+63/10 42/90+21/10 42/30+21/30 42/30+21/50 42/30+21/70