Add 90/70 and 70/28
1st number: 1 20/70, 2nd number: 2 14/28
90/70 + 70/28 is 53/14.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 70 and 28 is 140
Next, find the equivalent fraction of both fractional numbers with denominator 140 - For the 1st fraction, since 70 × 2 = 140,
90/70 = 90 × 2/70 × 2 = 180/140 - Likewise, for the 2nd fraction, since 28 × 5 = 140,
70/28 = 70 × 5/28 × 5 = 350/140 - Add the two like fractions:
180/140 + 350/140 = 180 + 350/140 = 530/140 - 530/140 simplified gives 53/14
- So, 90/70 + 70/28 = 53/14
In mixed form: 311/14
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/70+70/56 90/70+70/84