Subtract 1/70 from 42/63
42/63 - 1/70 is 137/210.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 63 and 70 is 630
Next, find the equivalent fraction of both fractional numbers with denominator 630 - For the 1st fraction, since 63 × 10 = 630,
42/63 = 42 × 10/63 × 10 = 420/630 - Likewise, for the 2nd fraction, since 70 × 9 = 630,
1/70 = 1 × 9/70 × 9 = 9/630 - Subtract the two like fractions:
420/630 - 9/630 = 420 - 9/630 = 411/630 - After reducing the fraction, the answer is 137/210
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/63-1/70 42/63-2/70 42/63-3/70 42/63-5/70 42/63-7/70