Subtract 12/45 from 15/70
15/70 - 12/45 is -11/210.
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,
15/70 = 15 × 9/70 × 9 = 135/630 - Likewise, for the 2nd fraction, since 45 × 14 = 630,
12/45 = 12 × 14/45 × 14 = 168/630 - Subtract the two like fractions:
135/630 - 168/630 = 135 - 168/630 = -33/630 - After reducing the fraction, the answer is -11/210
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 30/70-12/45 15/70-24/45 15/70-12/90 45/70-12/45 15/70-36/45 75/70-12/45 15/70-60/45 15/70-84/45