Subtract 15/84 from 30/90
30/90 - 15/84 is 13/84.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 90 and 84 is 1260
Next, find the equivalent fraction of both fractional numbers with denominator 1260 - For the 1st fraction, since 90 × 14 = 1260,
30/90 = 30 × 14/90 × 14 = 420/1260 - Likewise, for the 2nd fraction, since 84 × 15 = 1260,
15/84 = 15 × 15/84 × 15 = 225/1260 - Subtract the two like fractions:
420/1260 - 225/1260 = 420 - 225/1260 = 195/1260 - After reducing the fraction, the answer is 13/84
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 60/90-15/84 30/90-30/84 30/90-45/84 30/90-75/84