Subtract 12/45 from 20/70
20/70 - 12/45 is 2/105.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 70 and 45 is 630
Next, find the equivalent fraction of both fractional numbers with denominator 630 - For the 1st fraction, since 70 × 9 = 630,
20/70 = 20 × 9/70 × 9 = 180/630 - Likewise, for the 2nd fraction, since 45 × 14 = 630,
12/45 = 12 × 14/45 × 14 = 168/630 - Subtract the two like fractions:
180/630 - 168/630 = 180 - 168/630 = 12/630 - After reducing the fraction, the answer is 2/105
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/70-12/45 20/70-24/45 20/70-12/90 60/70-12/45 20/70-36/45 20/70-60/45 20/70-84/45