Add 3/20 and 90/70
1st number: 3/20, 2nd number: 1 20/70
3/20 + 90/70 is 201/140.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 70 is 140
Next, find the equivalent fraction of both fractional numbers with denominator 140 - For the 1st fraction, since 20 × 7 = 140,
3/20 = 3 × 7/20 × 7 = 21/140 - Likewise, for the 2nd fraction, since 70 × 2 = 140,
90/70 = 90 × 2/70 × 2 = 180/140 - Add the two like fractions:
21/140 + 180/140 = 21 + 180/140 = 201/140 - So, 3/20 + 90/70 = 201/140
In mixed form: 161/140
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 6/20+90/70 3/40+90/70 9/20+90/70 3/60+90/70 15/20+90/70 21/20+90/70