Add 3/80 and 70/45
1st number: 3/80, 2nd number: 1 25/45
3/80 + 70/45 is 1147/720.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 80 and 45 is 720
Next, find the equivalent fraction of both fractional numbers with denominator 720 - For the 1st fraction, since 80 × 9 = 720,
3/80 = 3 × 9/80 × 9 = 27/720 - Likewise, for the 2nd fraction, since 45 × 16 = 720,
70/45 = 70 × 16/45 × 16 = 1120/720 - Add the two like fractions:
27/720 + 1120/720 = 27 + 1120/720 = 1147/720 - So, 3/80 + 70/45 = 1147/720
In mixed form: 1427/720
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 6/80+70/45 3/80+70/90 9/80+70/45 15/80+70/45 21/80+70/45