Subtract 42/63 from 27/40
27/40 - 42/63 is 1/120.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 40 and 63 is 2520
Next, find the equivalent fraction of both fractional numbers with denominator 2520 - For the 1st fraction, since 40 × 63 = 2520,
27/40 = 27 × 63/40 × 63 = 1701/2520 - Likewise, for the 2nd fraction, since 63 × 40 = 2520,
42/63 = 42 × 40/63 × 40 = 1680/2520 - Subtract the two like fractions:
1701/2520 - 1680/2520 = 1701 - 1680/2520 = 21/2520 - After reducing the fraction, the answer is 1/120
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 54/40-42/63 27/40-84/63 27/80-42/63 81/40-42/63