Subtract 30/36 from 21/10
1st number: 2 1/10, 2nd number: 30/36
21/10 - 30/36 is 19/15.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 10 and 36 is 180
Next, find the equivalent fraction of both fractional numbers with denominator 180 - For the 1st fraction, since 10 × 18 = 180,
21/10 = 21 × 18/10 × 18 = 378/180 - Likewise, for the 2nd fraction, since 36 × 5 = 180,
30/36 = 30 × 5/36 × 5 = 150/180 - Subtract the two like fractions:
378/180 - 150/180 = 378 - 150/180 = 228/180 - After reducing the fraction, the answer is 19/15
- In mixed form: 14/15
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/10-30/36 21/10-60/36 21/20-30/36 21/10-30/72 63/10-30/36 21/10-90/36 21/30-30/36 21/50-30/36 21/70-30/36