Subtract 3/12 from 45/70
45/70 - 3/12 is 11/28.
Steps for subtracting 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,
3/12 = 3 × 35/12 × 35 = 105/420 - Subtract the two like fractions:
270/420 - 105/420 = 270 - 105/420 = 165/420 - After reducing the fraction, the answer is 11/28
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/70-3/12 45/70-6/12 45/70-3/24 45/70-9/12 45/70-3/36 45/70-15/12 45/70-3/60 45/70-21/12 45/70-3/84