Add 72/70 and 84/42
1st number: 1 2/70, 2nd number: 2 0/42
72/70 + 84/42 is 106/35.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 70 and 42 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 70 × 3 = 210,
72/70 = 72 × 3/70 × 3 = 216/210 - Likewise, for the 2nd fraction, since 42 × 5 = 210,
84/42 = 84 × 5/42 × 5 = 420/210 - Add the two like fractions:
216/210 + 420/210 = 216 + 420/210 = 636/210 - 636/210 simplified gives 106/35
- So, 72/70 + 84/42 = 106/35
In mixed form: 31/35
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: