Subtract 20/84 from 50/45
1st number: 1 5/45, 2nd number: 20/84
50/45 - 20/84 is 55/63.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 45 and 84 is 1260
Next, find the equivalent fraction of both fractional numbers with denominator 1260 - For the 1st fraction, since 45 × 28 = 1260,
50/45 = 50 × 28/45 × 28 = 1400/1260 - Likewise, for the 2nd fraction, since 84 × 15 = 1260,
20/84 = 20 × 15/84 × 15 = 300/1260 - Subtract the two like fractions:
1400/1260 - 300/1260 = 1400 - 300/1260 = 1100/1260 - After reducing the fraction, the answer is 55/63
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 50/45-40/84 50/90-20/84 50/45-60/84