Add 42/21 and 1/30
1st number: 2 0/21, 2nd number: 1/30
42/21 + 1/30 is 61/30.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 30 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 21 × 10 = 210,
42/21 = 42 × 10/21 × 10 = 420/210 - Likewise, for the 2nd fraction, since 30 × 7 = 210,
1/30 = 1 × 7/30 × 7 = 7/210 - Add the two like fractions:
420/210 + 7/210 = 420 + 7/210 = 427/210 - 427/210 simplified gives 61/30
- So, 42/21 + 1/30 = 61/30
In mixed form: 21/30
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/21+1/30 42/21+2/30 42/21+1/60 42/21+3/30 42/63+1/30 42/21+1/90 42/21+5/30 42/21+7/30