Subtract 3/10 from 25/42
25/42 - 3/10 is 31/105.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 10 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 42 × 5 = 210,
25/42 = 25 × 5/42 × 5 = 125/210 - Likewise, for the 2nd fraction, since 10 × 21 = 210,
3/10 = 3 × 21/10 × 21 = 63/210 - Subtract the two like fractions:
125/210 - 63/210 = 125 - 63/210 = 62/210 - After reducing the fraction, the answer is 31/105
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 50/42-3/10 25/42-6/10 25/84-3/10 25/42-3/20 75/42-3/10 25/42-9/10 25/42-3/30 25/42-15/10 25/42-3/50 25/42-21/10 25/42-3/70