Add 84/30 and 54/42
1st number: 2 24/30, 2nd number: 1 12/42
84/30 + 54/42 is 143/35.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 30 and 42 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 30 × 7 = 210,
84/30 = 84 × 7/30 × 7 = 588/210 - Likewise, for the 2nd fraction, since 42 × 5 = 210,
54/42 = 54 × 5/42 × 5 = 270/210 - Add the two like fractions:
588/210 + 270/210 = 588 + 270/210 = 858/210 - 858/210 simplified gives 143/35
- So, 84/30 + 54/42 = 143/35
In mixed form: 43/35
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/60+54/42 84/30+54/84 84/90+54/42