Subtract 30/50 from 42/63
42/63 - 30/50 is 1/15.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 63 and 50 is 3150
Next, find the equivalent fraction of both fractional numbers with denominator 3150 - For the 1st fraction, since 63 × 50 = 3150,
42/63 = 42 × 50/63 × 50 = 2100/3150 - Likewise, for the 2nd fraction, since 50 × 63 = 3150,
30/50 = 30 × 63/50 × 63 = 1890/3150 - Subtract the two like fractions:
2100/3150 - 1890/3150 = 2100 - 1890/3150 = 210/3150 - After reducing the fraction, the answer is 1/15
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/63-30/50 42/63-60/50 42/63-90/50