Subtract 30/72 from 40/5
1st number: 8 0/5, 2nd number: 30/72
40/5 - 30/72 is 91/12.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 5 and 72 is 360
Next, find the equivalent fraction of both fractional numbers with denominator 360 - For the 1st fraction, since 5 × 72 = 360,
40/5 = 40 × 72/5 × 72 = 2880/360 - Likewise, for the 2nd fraction, since 72 × 5 = 360,
30/72 = 30 × 5/72 × 5 = 150/360 - Subtract the two like fractions:
2880/360 - 150/360 = 2880 - 150/360 = 2730/360 - After reducing the fraction, the answer is 91/12
- In mixed form: 77/12
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 80/5-30/72 40/5-60/72 40/10-30/72 40/5-90/72 40/15-30/72 40/25-30/72 40/35-30/72