Subtract 2/42 from 45/63
45/63 - 2/42 is 2/3.
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,
45/63 = 45 × 2/63 × 2 = 90/126 - Likewise, for the 2nd fraction, since 42 × 3 = 126,
2/42 = 2 × 3/42 × 3 = 6/126 - Subtract the two like fractions:
90/126 - 6/126 = 90 - 6/126 = 84/126 - After reducing the fraction, the answer is 2/3
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/63-2/42 45/63-4/42 45/63-2/84 45/63-6/42 45/63-10/42 45/63-14/42