Subtract 15/42 from 24/70
24/70 - 15/42 is -1/70.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 70 and 42 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 70 × 3 = 210,
24/70 = 24 × 3/70 × 3 = 72/210 - Likewise, for the 2nd fraction, since 42 × 5 = 210,
15/42 = 15 × 5/42 × 5 = 75/210 - Subtract the two like fractions:
72/210 - 75/210 = 72 - 75/210 = -3/210 - After reducing the fraction, the answer is -1/70
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 48/70-15/42 24/70-30/42 24/70-15/84 72/70-15/42 24/70-45/42 24/70-75/42