Add 45/20 and 70/12
1st number: 2 5/20, 2nd number: 5 10/12
45/20 + 70/12 is 97/12.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 12 is 60
Next, find the equivalent fraction of both fractional numbers with denominator 60 - For the 1st fraction, since 20 × 3 = 60,
45/20 = 45 × 3/20 × 3 = 135/60 - Likewise, for the 2nd fraction, since 12 × 5 = 60,
70/12 = 70 × 5/12 × 5 = 350/60 - Add the two like fractions:
135/60 + 350/60 = 135 + 350/60 = 485/60 - 485/60 simplified gives 97/12
- So, 45/20 + 70/12 = 97/12
In mixed form: 81/12
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/20+70/12 45/40+70/12 45/20+70/24 45/60+70/12 45/20+70/36 45/20+70/60 45/20+70/84