Subtract 10/42 from 30/63
30/63 - 10/42 is 5/21.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 63 and 42 is 126
Next, find the equivalent fraction of both fractional numbers with denominator 126 - For the 1st fraction, since 63 × 2 = 126,
30/63 = 30 × 2/63 × 2 = 60/126 - Likewise, for the 2nd fraction, since 42 × 3 = 126,
10/42 = 10 × 3/42 × 3 = 30/126 - Subtract the two like fractions:
60/126 - 30/126 = 60 - 30/126 = 30/126 - After reducing the fraction, the answer is 5/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 60/63-10/42 30/63-20/42 30/63-10/84 90/63-10/42 30/63-30/42 30/63-50/42 30/63-70/42