Subtract 30/36 from 7/20
7/20 - 30/36 is -29/60.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 36 is 180
Next, find the equivalent fraction of both fractional numbers with denominator 180 - For the 1st fraction, since 20 × 9 = 180,
7/20 = 7 × 9/20 × 9 = 63/180 - Likewise, for the 2nd fraction, since 36 × 5 = 180,
30/36 = 30 × 5/36 × 5 = 150/180 - Subtract the two like fractions:
63/180 - 150/180 = 63 - 150/180 = -87/180 - After reducing the fraction, the answer is -29/60
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 14/20-30/36 7/20-60/36 7/40-30/36 7/20-30/72 21/20-30/36 7/20-90/36 7/60-30/36 35/20-30/36 49/20-30/36