Subtract 30/42 from 50/45
1st number: 1 5/45, 2nd number: 30/42
50/45 - 30/42 is 25/63.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 45 and 42 is 630
Next, find the equivalent fraction of both fractional numbers with denominator 630 - For the 1st fraction, since 45 × 14 = 630,
50/45 = 50 × 14/45 × 14 = 700/630 - Likewise, for the 2nd fraction, since 42 × 15 = 630,
30/42 = 30 × 15/42 × 15 = 450/630 - Subtract the two like fractions:
700/630 - 450/630 = 700 - 450/630 = 250/630 - After reducing the fraction, the answer is 25/63
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 50/45-60/42 50/90-30/42 50/45-30/84 50/45-90/42