Subtract 50/45 from 4/21
1st number: 4/21, 2nd number: 1 5/45
4/21 - 50/45 is -58/63.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 45 is 315
Next, find the equivalent fraction of both fractional numbers with denominator 315 - For the 1st fraction, since 21 × 15 = 315,
4/21 = 4 × 15/21 × 15 = 60/315 - Likewise, for the 2nd fraction, since 45 × 7 = 315,
50/45 = 50 × 7/45 × 7 = 350/315 - Subtract the two like fractions:
60/315 - 350/315 = 60 - 350/315 = -290/315 - After reducing the fraction, the answer is -58/63
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 8/21-50/45 4/42-50/45 4/21-50/90 12/21-50/45 4/63-50/45 20/21-50/45 28/21-50/45