Add 70/18 and 90/5
1st number: 3 16/18, 2nd number: 18 0/5
70/18 + 90/5 is 197/9.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 18 and 5 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 5 × 18 = 90,
90/5 = 90 × 18/5 × 18 = 1620/90 - Add the two like fractions:
350/90 + 1620/90 = 350 + 1620/90 = 1970/90 - 1970/90 simplified gives 197/9
- So, 70/18 + 90/5 = 197/9
In mixed form: 218/9
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 70/36+90/5 70/18+90/10 70/54+90/5 70/18+90/15 70/90+90/5 70/18+90/25 70/18+90/35