Add 15/25 and 70/90
15/25 + 70/90 is 62/45.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 25 and 90 is 450
Next, find the equivalent fraction of both fractional numbers with denominator 450 - For the 1st fraction, since 25 × 18 = 450,
15/25 = 15 × 18/25 × 18 = 270/450 - Likewise, for the 2nd fraction, since 90 × 5 = 450,
70/90 = 70 × 5/90 × 5 = 350/450 - Add the two like fractions:
270/450 + 350/450 = 270 + 350/450 = 620/450 - 620/450 simplified gives 62/45
- So, 15/25 + 70/90 = 62/45
In mixed form: 117/45
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 30/25+70/90 15/50+70/90 45/25+70/90 15/75+70/90 75/25+70/90