Subtract 72/10 from 50/42
1st number: 1 8/42, 2nd number: 7 2/10
50/42 - 72/10 is -631/105.
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,
50/42 = 50 × 5/42 × 5 = 250/210 - Likewise, for the 2nd fraction, since 10 × 21 = 210,
72/10 = 72 × 21/10 × 21 = 1512/210 - Subtract the two like fractions:
250/210 - 1512/210 = 250 - 1512/210 = -1262/210 - After reducing the fraction, the answer is -631/105
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 50/84-72/10 50/42-72/20 50/42-72/30 50/42-72/50 50/42-72/70