Add 42/30 and 30/84
1st number: 1 12/30, 2nd number: 30/84
42/30 + 30/84 is 123/70.
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,
30/84 = 30 × 5/84 × 5 = 150/420 - Add the two like fractions:
588/420 + 150/420 = 588 + 150/420 = 738/420 - 738/420 simplified gives 123/70
- So, 42/30 + 30/84 = 123/70
In mixed form: 153/70
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/30+30/84 42/30+60/84 42/60+30/84 42/30+90/84 42/90+30/84