Add 70/18 and 1/90
1st number: 3 16/18, 2nd number: 1/90
70/18 + 1/90 is 39/10.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 18 and 90 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 90 × 1 = 90,
1/90 = 1 × 1/90 × 1 = 1/90 - Add the two like fractions:
350/90 + 1/90 = 350 + 1/90 = 351/90 - 351/90 simplified gives 39/10
- So, 70/18 + 1/90 = 39/10
In mixed form: 39/10
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 70/18+2/90 70/36+1/90 70/18+3/90 70/54+1/90 70/18+5/90 70/90+1/90 70/18+7/90