Subtract 20/70 from 40/63
40/63 - 20/70 is 22/63.
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,
40/63 = 40 × 10/63 × 10 = 400/630 - Likewise, for the 2nd fraction, since 70 × 9 = 630,
20/70 = 20 × 9/70 × 9 = 180/630 - Subtract the two like fractions:
400/630 - 180/630 = 400 - 180/630 = 220/630 - After reducing the fraction, the answer is 22/63
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 80/63-20/70 40/63-40/70 40/63-60/70