Add 45/12 and 70/4
1st number: 3 9/12, 2nd number: 17 2/4
45/12 + 70/4 is 85/4.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 12 and 4 is 12
Next, find the equivalent fraction of both fractional numbers with denominator 12 - For the 1st fraction, since 12 × 1 = 12,
45/12 = 45 × 1/12 × 1 = 45/12 - Likewise, for the 2nd fraction, since 4 × 3 = 12,
70/4 = 70 × 3/4 × 3 = 210/12 - Add the two like fractions:
45/12 + 210/12 = 45 + 210/12 = 255/12 - 255/12 simplified gives 85/4
- So, 45/12 + 70/4 = 85/4
In mixed form: 211/4
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/12+70/4 45/24+70/4 45/12+70/8 45/36+70/4 45/12+70/12 45/60+70/4 45/12+70/20 45/84+70/4 45/12+70/28