Add 70/18 and 63/42
1st number: 3 16/18, 2nd number: 1 21/42
70/18 + 63/42 is 97/18.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 18 and 42 is 126
Next, find the equivalent fraction of both fractional numbers with denominator 126 - For the 1st fraction, since 18 × 7 = 126,
70/18 = 70 × 7/18 × 7 = 490/126 - Likewise, for the 2nd fraction, since 42 × 3 = 126,
63/42 = 63 × 3/42 × 3 = 189/126 - Add the two like fractions:
490/126 + 189/126 = 490 + 189/126 = 679/126 - 679/126 simplified gives 97/18
- So, 70/18 + 63/42 = 97/18
In mixed form: 57/18
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 70/36+63/42 70/18+63/84 70/54+63/42 70/90+63/42