Add 42/30 and 63/84
1st number: 1 12/30, 2nd number: 63/84
42/30 + 63/84 is 43/20.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 30 and 84 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 30 × 14 = 420,
42/30 = 42 × 14/30 × 14 = 588/420 - Likewise, for the 2nd fraction, since 84 × 5 = 420,
63/84 = 63 × 5/84 × 5 = 315/420 - Add the two like fractions:
588/420 + 315/420 = 588 + 315/420 = 903/420 - 903/420 simplified gives 43/20
- So, 42/30 + 63/84 = 43/20
In mixed form: 23/20
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/30+63/84 42/60+63/84 42/90+63/84