Subtract 70/18 from 72/75
1st number: 72/75, 2nd number: 3 16/18
72/75 - 70/18 is -659/225.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 75 and 18 is 450
Next, find the equivalent fraction of both fractional numbers with denominator 450 - For the 1st fraction, since 75 × 6 = 450,
72/75 = 72 × 6/75 × 6 = 432/450 - Likewise, for the 2nd fraction, since 18 × 25 = 450,
70/18 = 70 × 25/18 × 25 = 1750/450 - Subtract the two like fractions:
432/450 - 1750/450 = 432 - 1750/450 = -1318/450 - After reducing the fraction, the answer is -659/225
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 72/75-70/36 72/75-70/54 72/75-70/90