Subtract 63/42 from 30/12
1st number: 2 6/12, 2nd number: 1 21/42
30/12 - 63/42 is 1/1.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 12 and 42 is 84
Next, find the equivalent fraction of both fractional numbers with denominator 84 - For the 1st fraction, since 12 × 7 = 84,
30/12 = 30 × 7/12 × 7 = 210/84 - Likewise, for the 2nd fraction, since 42 × 2 = 84,
63/42 = 63 × 2/42 × 2 = 126/84 - Subtract the two like fractions:
210/84 - 126/84 = 210 - 126/84 = 84/84 - After reducing the fraction, the answer is 1/1
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 60/12-63/42 30/24-63/42 30/12-63/84 90/12-63/42 30/36-63/42 30/60-63/42 30/84-63/42