Subtract 25/8 from 36/21
1st number: 1 15/21, 2nd number: 3 1/8
36/21 - 25/8 is -79/56.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 8 is 168
Next, find the equivalent fraction of both fractional numbers with denominator 168 - For the 1st fraction, since 21 × 8 = 168,
36/21 = 36 × 8/21 × 8 = 288/168 - Likewise, for the 2nd fraction, since 8 × 21 = 168,
25/8 = 25 × 21/8 × 21 = 525/168 - Subtract the two like fractions:
288/168 - 525/168 = 288 - 525/168 = -237/168 - After reducing the fraction, the answer is -79/56
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 72/21-25/8 36/21-50/8 36/42-25/8 36/21-25/16 36/21-75/8 36/63-25/8 36/21-25/24 36/21-25/40 36/21-25/56