Subtract 63/27 from 42/40
1st number: 1 2/40, 2nd number: 2 9/27
42/40 - 63/27 is -77/60.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 40 and 27 is 1080
Next, find the equivalent fraction of both fractional numbers with denominator 1080 - For the 1st fraction, since 40 × 27 = 1080,
42/40 = 42 × 27/40 × 27 = 1134/1080 - Likewise, for the 2nd fraction, since 27 × 40 = 1080,
63/27 = 63 × 40/27 × 40 = 2520/1080 - Subtract the two like fractions:
1134/1080 - 2520/1080 = 1134 - 2520/1080 = -1386/1080 - After reducing the fraction, the answer is -77/60
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/40-63/27 42/80-63/27 42/40-63/54 42/40-63/81