Subtract 3/90 from 8/84
8/84 - 3/90 is 13/210.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 84 and 90 is 1260
Next, find the equivalent fraction of both fractional numbers with denominator 1260 - For the 1st fraction, since 84 × 15 = 1260,
8/84 = 8 × 15/84 × 15 = 120/1260 - Likewise, for the 2nd fraction, since 90 × 14 = 1260,
3/90 = 3 × 14/90 × 14 = 42/1260 - Subtract the two like fractions:
120/1260 - 42/1260 = 120 - 42/1260 = 78/1260 - After reducing the fraction, the answer is 13/210
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 16/84-3/90 8/84-6/90 24/84-3/90 8/84-9/90 40/84-3/90 8/84-15/90 56/84-3/90 8/84-21/90