Subtract 42/30 from 9/10
1st number: 9/10, 2nd number: 1 12/30
9/10 - 42/30 is -1/2.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 10 and 30 is 30
Next, find the equivalent fraction of both fractional numbers with denominator 30 - For the 1st fraction, since 10 × 3 = 30,
9/10 = 9 × 3/10 × 3 = 27/30 - Likewise, for the 2nd fraction, since 30 × 1 = 30,
42/30 = 42 × 1/30 × 1 = 42/30 - Subtract the two like fractions:
27/30 - 42/30 = 27 - 42/30 = -15/30 - After reducing the fraction, the answer is -1/2
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 18/10-42/30 9/10-84/30 9/20-42/30 9/10-42/60 27/10-42/30 9/30-42/30 9/10-42/90 45/10-42/30 9/50-42/30 63/10-42/30 9/70-42/30