Subtract 8/5 from 30/72
1st number: 30/72, 2nd number: 1 3/5
30/72 - 8/5 is -71/60.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 72 and 5 is 360
Next, find the equivalent fraction of both fractional numbers with denominator 360 - For the 1st fraction, since 72 × 5 = 360,
30/72 = 30 × 5/72 × 5 = 150/360 - Likewise, for the 2nd fraction, since 5 × 72 = 360,
8/5 = 8 × 72/5 × 72 = 576/360 - Subtract the two like fractions:
150/360 - 576/360 = 150 - 576/360 = -426/360 - After reducing the fraction, the answer is -71/60
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 60/72-8/5 30/72-16/5 30/72-8/10 90/72-8/5 30/72-24/5 30/72-8/15 30/72-40/5 30/72-8/25 30/72-56/5 30/72-8/35