Subtract 42/70 from 15/24
15/24 - 42/70 is 1/40.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 24 and 70 is 840
Next, find the equivalent fraction of both fractional numbers with denominator 840 - For the 1st fraction, since 24 × 35 = 840,
15/24 = 15 × 35/24 × 35 = 525/840 - Likewise, for the 2nd fraction, since 70 × 12 = 840,
42/70 = 42 × 12/70 × 12 = 504/840 - Subtract the two like fractions:
525/840 - 504/840 = 525 - 504/840 = 21/840 - After reducing the fraction, the answer is 1/40
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 30/24-42/70 15/24-84/70 15/48-42/70 45/24-42/70 15/72-42/70 75/24-42/70