Add 70/90 and 28/8
1st number: 70/90, 2nd number: 3 4/8
70/90 + 28/8 is 77/18.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 90 and 8 is 360
Next, find the equivalent fraction of both fractional numbers with denominator 360 - For the 1st fraction, since 90 × 4 = 360,
70/90 = 70 × 4/90 × 4 = 280/360 - Likewise, for the 2nd fraction, since 8 × 45 = 360,
28/8 = 28 × 45/8 × 45 = 1260/360 - Add the two like fractions:
280/360 + 1260/360 = 280 + 1260/360 = 1540/360 - 1540/360 simplified gives 77/18
- So, 70/90 + 28/8 = 77/18
In mixed form: 45/18
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 70/90+56/8 70/90+28/16 70/90+84/8 70/90+28/24 70/90+28/40 70/90+28/56