Add 70/18 and 40/30
1st number: 3 16/18, 2nd number: 1 10/30
70/18 + 40/30 is 47/9.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 18 and 30 is 90
Next, find the equivalent fraction of both fractional numbers with denominator 90 - For the 1st fraction, since 18 × 5 = 90,
70/18 = 70 × 5/18 × 5 = 350/90 - Likewise, for the 2nd fraction, since 30 × 3 = 90,
40/30 = 40 × 3/30 × 3 = 120/90 - Add the two like fractions:
350/90 + 120/90 = 350 + 120/90 = 470/90 - 470/90 simplified gives 47/9
- So, 70/18 + 40/30 = 47/9
In mixed form: 52/9
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 70/18+80/30 70/36+40/30 70/18+40/60 70/54+40/30 70/18+40/90 70/90+40/30