Subtract 36/3 from 21/30
1st number: 21/30, 2nd number: 12 0/3
21/30 - 36/3 is -113/10.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 30 and 3 is 30
Next, find the equivalent fraction of both fractional numbers with denominator 30 - For the 1st fraction, since 30 × 1 = 30,
21/30 = 21 × 1/30 × 1 = 21/30 - Likewise, for the 2nd fraction, since 3 × 10 = 30,
36/3 = 36 × 10/3 × 10 = 360/30 - Subtract the two like fractions:
21/30 - 360/30 = 21 - 360/30 = -339/30 - After reducing the fraction, the answer is -113/10
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/30-36/3 21/30-72/3 21/60-36/3 21/30-36/6 63/30-36/3 21/90-36/3 21/30-36/9 21/30-36/15 21/30-36/21