Add 54/42 and 70/30
1st number: 1 12/42, 2nd number: 2 10/30
54/42 + 70/30 is 76/21.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 30 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 42 × 5 = 210,
54/42 = 54 × 5/42 × 5 = 270/210 - Likewise, for the 2nd fraction, since 30 × 7 = 210,
70/30 = 70 × 7/30 × 7 = 490/210 - Add the two like fractions:
270/210 + 490/210 = 270 + 490/210 = 760/210 - 760/210 simplified gives 76/21
- So, 54/42 + 70/30 = 76/21
In mixed form: 313/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 54/84+70/30 54/42+70/60 54/42+70/90