Subtract 21/90 from 8/98
8/98 - 21/90 is -223/1470.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 98 and 90 is 4410
Next, find the equivalent fraction of both fractional numbers with denominator 4410 - For the 1st fraction, since 98 × 45 = 4410,
8/98 = 8 × 45/98 × 45 = 360/4410 - Likewise, for the 2nd fraction, since 90 × 49 = 4410,
21/90 = 21 × 49/90 × 49 = 1029/4410 - Subtract the two like fractions:
360/4410 - 1029/4410 = 360 - 1029/4410 = -669/4410 - After reducing the fraction, the answer is -223/1470
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 16/98-21/90 8/98-42/90 24/98-21/90 8/98-63/90 40/98-21/90 56/98-21/90