Subtract 54/42 from 9/10
1st number: 9/10, 2nd number: 1 12/42
9/10 - 54/42 is -27/70.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 10 and 42 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 10 × 21 = 210,
9/10 = 9 × 21/10 × 21 = 189/210 - Likewise, for the 2nd fraction, since 42 × 5 = 210,
54/42 = 54 × 5/42 × 5 = 270/210 - Subtract the two like fractions:
189/210 - 270/210 = 189 - 270/210 = -81/210 - After reducing the fraction, the answer is -27/70
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 18/10-54/42 9/20-54/42 9/10-54/84 27/10-54/42 9/30-54/42 45/10-54/42 9/50-54/42 63/10-54/42 9/70-54/42