Subtract 72/9 from 4/10
1st number: 4/10, 2nd number: 8 0/9
4/10 - 72/9 is -38/5.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 10 and 9 is 90
Next, find the equivalent fraction of both fractional numbers with denominator 90 - For the 1st fraction, since 10 × 9 = 90,
4/10 = 4 × 9/10 × 9 = 36/90 - Likewise, for the 2nd fraction, since 9 × 10 = 90,
72/9 = 72 × 10/9 × 10 = 720/90 - Subtract the two like fractions:
36/90 - 720/90 = 36 - 720/90 = -684/90 - After reducing the fraction, the answer is -38/5
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 8/10-72/9 4/20-72/9 4/10-72/18 12/10-72/9 4/30-72/9 4/10-72/27 20/10-72/9 4/50-72/9 4/10-72/45 28/10-72/9 4/70-72/9 4/10-72/63