Subtract 70/72 from 1/30
1/30 - 70/72 is -169/180.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 30 and 72 is 360
Next, find the equivalent fraction of both fractional numbers with denominator 360 - For the 1st fraction, since 30 × 12 = 360,
1/30 = 1 × 12/30 × 12 = 12/360 - Likewise, for the 2nd fraction, since 72 × 5 = 360,
70/72 = 70 × 5/72 × 5 = 350/360 - Subtract the two like fractions:
12/360 - 350/360 = 12 - 350/360 = -338/360 - After reducing the fraction, the answer is -169/180
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 2/30-70/72 1/60-70/72 3/30-70/72 1/90-70/72 5/30-70/72 7/30-70/72