Subtract 5/90 from 90/84
1st number: 1 6/84, 2nd number: 5/90
90/84 - 5/90 is 64/63.
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,
90/84 = 90 × 15/84 × 15 = 1350/1260 - Likewise, for the 2nd fraction, since 90 × 14 = 1260,
5/90 = 5 × 14/90 × 14 = 70/1260 - Subtract the two like fractions:
1350/1260 - 70/1260 = 1350 - 70/1260 = 1280/1260 - After reducing the fraction, the answer is 64/63
- In mixed form: 11/63
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/84-10/90 90/84-15/90 90/84-25/90 90/84-35/90