Add 7/84 and 42/30
1st number: 7/84, 2nd number: 1 12/30
7/84 + 42/30 is 89/60.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 84 and 30 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 84 × 5 = 420,
7/84 = 7 × 5/84 × 5 = 35/420 - Likewise, for the 2nd fraction, since 30 × 14 = 420,
42/30 = 42 × 14/30 × 14 = 588/420 - Add the two like fractions:
35/420 + 588/420 = 35 + 588/420 = 623/420 - 623/420 simplified gives 89/60
- So, 7/84 + 42/30 = 89/60
In mixed form: 129/60
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 14/84+42/30 7/84+84/30 7/84+42/60 21/84+42/30 7/84+42/90 35/84+42/30 49/84+42/30