Add 70/45 and 15/90
1st number: 1 25/45, 2nd number: 15/90
70/45 + 15/90 is 31/18.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 45 and 90 is 90
Next, find the equivalent fraction of both fractional numbers with denominator 90 - For the 1st fraction, since 45 × 2 = 90,
70/45 = 70 × 2/45 × 2 = 140/90 - Likewise, for the 2nd fraction, since 90 × 1 = 90,
15/90 = 15 × 1/90 × 1 = 15/90 - Add the two like fractions:
140/90 + 15/90 = 140 + 15/90 = 155/90 - 155/90 simplified gives 31/18
- So, 70/45 + 15/90 = 31/18
In mixed form: 113/18
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 70/45+30/90 70/90+15/90 70/45+45/90 70/45+75/90