Add 70/90 and 28/45
70/90 + 28/45 is 7/5.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 90 and 45 is 90
Next, find the equivalent fraction of both fractional numbers with denominator 90 - For the 1st fraction, since 90 × 1 = 90,
70/90 = 70 × 1/90 × 1 = 70/90 - Likewise, for the 2nd fraction, since 45 × 2 = 90,
28/45 = 28 × 2/45 × 2 = 56/90 - Add the two like fractions:
70/90 + 56/90 = 70 + 56/90 = 126/90 - 126/90 simplified gives 7/5
- So, 70/90 + 28/45 = 7/5
In mixed form: 12/5
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 70/90+56/45 70/90+28/90 70/90+84/45