Subtract 28/72 from 72/70
1st number: 1 2/70, 2nd number: 28/72
72/70 - 28/72 is 403/630.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 70 and 72 is 2520
Next, find the equivalent fraction of both fractional numbers with denominator 2520 - For the 1st fraction, since 70 × 36 = 2520,
72/70 = 72 × 36/70 × 36 = 2592/2520 - Likewise, for the 2nd fraction, since 72 × 35 = 2520,
28/72 = 28 × 35/72 × 35 = 980/2520 - Subtract the two like fractions:
2592/2520 - 980/2520 = 2592 - 980/2520 = 1612/2520 - After reducing the fraction, the answer is 403/630
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 72/70-56/72 72/70-84/72