Subtract 4/5 from 12/72
12/72 - 4/5 is -19/30.
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,
12/72 = 12 × 5/72 × 5 = 60/360 - Likewise, for the 2nd fraction, since 5 × 72 = 360,
4/5 = 4 × 72/5 × 72 = 288/360 - Subtract the two like fractions:
60/360 - 288/360 = 60 - 288/360 = -228/360 - After reducing the fraction, the answer is -19/30
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 24/72-4/5 12/72-8/5 12/72-4/10 36/72-4/5 12/72-12/5 12/72-4/15 60/72-4/5 12/72-20/5 12/72-4/25 84/72-4/5 12/72-28/5 12/72-4/35