Subtract 42/70 from 14/18
14/18 - 42/70 is 8/45.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 18 and 70 is 630
Next, find the equivalent fraction of both fractional numbers with denominator 630 - For the 1st fraction, since 18 × 35 = 630,
14/18 = 14 × 35/18 × 35 = 490/630 - Likewise, for the 2nd fraction, since 70 × 9 = 630,
42/70 = 42 × 9/70 × 9 = 378/630 - Subtract the two like fractions:
490/630 - 378/630 = 490 - 378/630 = 112/630 - After reducing the fraction, the answer is 8/45
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 28/18-42/70 14/18-84/70 14/36-42/70 42/18-42/70 14/54-42/70 70/18-42/70 14/90-42/70 98/18-42/70