Subtract 8/10 from 42/63
42/63 - 8/10 is -2/15.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 63 and 10 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 10 × 63 = 630,
8/10 = 8 × 63/10 × 63 = 504/630 - Subtract the two like fractions:
420/630 - 504/630 = 420 - 504/630 = -84/630 - After reducing the fraction, the answer is -2/15
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/63-8/10 42/63-16/10 42/63-8/20 42/63-24/10 42/63-8/30 42/63-40/10 42/63-8/50 42/63-56/10 42/63-8/70