Subtract 25/45 from 21/35
21/35 - 25/45 is 2/45.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 35 and 45 is 315
Next, find the equivalent fraction of both fractional numbers with denominator 315 - For the 1st fraction, since 35 × 9 = 315,
21/35 = 21 × 9/35 × 9 = 189/315 - Likewise, for the 2nd fraction, since 45 × 7 = 315,
25/45 = 25 × 7/45 × 7 = 175/315 - Subtract the two like fractions:
189/315 - 175/315 = 189 - 175/315 = 14/315 - After reducing the fraction, the answer is 2/45
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/35-25/45 21/35-50/45 21/70-25/45 21/35-25/90 63/35-25/45 21/35-75/45