Add 70/4 and 45/12
1st number: 17 2/4, 2nd number: 3 9/12
70/4 + 45/12 is 85/4.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 4 and 12 is 12
Next, find the equivalent fraction of both fractional numbers with denominator 12 - For the 1st fraction, since 4 × 3 = 12,
70/4 = 70 × 3/4 × 3 = 210/12 - Likewise, for the 2nd fraction, since 12 × 1 = 12,
45/12 = 45 × 1/12 × 1 = 45/12 - Add the two like fractions:
210/12 + 45/12 = 210 + 45/12 = 255/12 - 255/12 simplified gives 85/4
- So, 70/4 + 45/12 = 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: 70/4+90/12 70/8+45/12 70/4+45/24 70/12+45/12 70/4+45/36 70/20+45/12 70/4+45/60 70/28+45/12 70/4+45/84