Subtract 72/70 from 10/45
1st number: 10/45, 2nd number: 1 2/70
10/45 - 72/70 is -254/315.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 45 and 70 is 630
Next, find the equivalent fraction of both fractional numbers with denominator 630 - For the 1st fraction, since 45 × 14 = 630,
10/45 = 10 × 14/45 × 14 = 140/630 - Likewise, for the 2nd fraction, since 70 × 9 = 630,
72/70 = 72 × 9/70 × 9 = 648/630 - Subtract the two like fractions:
140/630 - 648/630 = 140 - 648/630 = -508/630 - After reducing the fraction, the answer is -254/315
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 20/45-72/70 10/90-72/70 30/45-72/70 50/45-72/70 70/45-72/70