Add 4/18 and 70/21
1st number: 4/18, 2nd number: 3 7/21
4/18 + 70/21 is 32/9.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 18 and 21 is 126
Next, find the equivalent fraction of both fractional numbers with denominator 126 - For the 1st fraction, since 18 × 7 = 126,
4/18 = 4 × 7/18 × 7 = 28/126 - Likewise, for the 2nd fraction, since 21 × 6 = 126,
70/21 = 70 × 6/21 × 6 = 420/126 - Add the two like fractions:
28/126 + 420/126 = 28 + 420/126 = 448/126 - 448/126 simplified gives 32/9
- So, 4/18 + 70/21 = 32/9
In mixed form: 35/9
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 8/18+70/21 4/36+70/21 4/18+70/42 12/18+70/21 4/54+70/21 4/18+70/63 20/18+70/21 4/90+70/21 28/18+70/21