Add 45/70 and 5/12
45/70 + 5/12 is 89/84.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 70 and 12 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 70 × 6 = 420,
45/70 = 45 × 6/70 × 6 = 270/420 - Likewise, for the 2nd fraction, since 12 × 35 = 420,
5/12 = 5 × 35/12 × 35 = 175/420 - Add the two like fractions:
270/420 + 175/420 = 270 + 175/420 = 445/420 - 445/420 simplified gives 89/84
- So, 45/70 + 5/12 = 89/84
In mixed form: 15/84
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/70+5/12 45/70+10/12 45/70+5/24 45/70+15/12 45/70+5/36 45/70+25/12 45/70+5/60 45/70+35/12 45/70+5/84