Subtract 36/10 from 30/42
1st number: 30/42, 2nd number: 3 6/10
30/42 - 36/10 is -101/35.
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,
30/42 = 30 × 5/42 × 5 = 150/210 - Likewise, for the 2nd fraction, since 10 × 21 = 210,
36/10 = 36 × 21/10 × 21 = 756/210 - Subtract the two like fractions:
150/210 - 756/210 = 150 - 756/210 = -606/210 - After reducing the fraction, the answer is -101/35
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 60/42-36/10 30/42-72/10 30/84-36/10 30/42-36/20 90/42-36/10 30/42-36/30 30/42-36/50 30/42-36/70