Subtract 40/30 from 42/10
1st number: 4 2/10, 2nd number: 1 10/30
42/10 - 40/30 is 43/15.
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,
42/10 = 42 × 3/10 × 3 = 126/30 - Likewise, for the 2nd fraction, since 30 × 1 = 30,
40/30 = 40 × 1/30 × 1 = 40/30 - Subtract the two like fractions:
126/30 - 40/30 = 126 - 40/30 = 86/30 - After reducing the fraction, the answer is 43/15
- In mixed form: 213/15
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/10-40/30 42/10-80/30 42/20-40/30 42/10-40/60 42/30-40/30 42/10-40/90 42/50-40/30 42/70-40/30