Subtract 42/10 from 2/45
1st number: 2/45, 2nd number: 4 2/10
2/45 - 42/10 is -187/45.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 45 and 10 is 90
Next, find the equivalent fraction of both fractional numbers with denominator 90 - For the 1st fraction, since 45 × 2 = 90,
2/45 = 2 × 2/45 × 2 = 4/90 - Likewise, for the 2nd fraction, since 10 × 9 = 90,
42/10 = 42 × 9/10 × 9 = 378/90 - Subtract the two like fractions:
4/90 - 378/90 = 4 - 378/90 = -374/90 - After reducing the fraction, the answer is -187/45
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 4/45-42/10 2/45-84/10 2/90-42/10 2/45-42/20 6/45-42/10 2/45-42/30 10/45-42/10 2/45-42/50 14/45-42/10 2/45-42/70