Subtract 28/70 from 72/63
1st number: 1 9/63, 2nd number: 28/70
72/63 - 28/70 is 26/35.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 63 and 70 is 630
Next, find the equivalent fraction of both fractional numbers with denominator 630 - For the 1st fraction, since 63 × 10 = 630,
72/63 = 72 × 10/63 × 10 = 720/630 - Likewise, for the 2nd fraction, since 70 × 9 = 630,
28/70 = 28 × 9/70 × 9 = 252/630 - Subtract the two like fractions:
720/630 - 252/630 = 720 - 252/630 = 468/630 - After reducing the fraction, the answer is 26/35
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 72/63-56/70 72/63-84/70