Subtract 3/25 from 21/12
1st number: 1 9/12, 2nd number: 3/25
21/12 - 3/25 is 163/100.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 12 and 25 is 300
Next, find the equivalent fraction of both fractional numbers with denominator 300 - For the 1st fraction, since 12 × 25 = 300,
21/12 = 21 × 25/12 × 25 = 525/300 - Likewise, for the 2nd fraction, since 25 × 12 = 300,
3/25 = 3 × 12/25 × 12 = 36/300 - Subtract the two like fractions:
525/300 - 36/300 = 525 - 36/300 = 489/300 - After reducing the fraction, the answer is 163/100
- In mixed form: 163/100
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/12-3/25 21/12-6/25 21/24-3/25 21/12-3/50 63/12-3/25 21/12-9/25 21/36-3/25 21/12-3/75 21/12-15/25 21/60-3/25 21/12-21/25 21/84-3/25