Compare 90/81 and 81/63
1st number: 1 9/81, 2nd number: 1 18/63
90/81 is smaller than 81/63
Steps for comparing fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 81 and 63 is 567
Next, find the equivalent fraction of both fractional numbers with denominator 567 - For the 1st fraction, since 81 × 7 = 567,
90/81 = 90 × 7/81 × 7 = 630/567 - Likewise, for the 2nd fraction, since 63 × 9 = 567,
81/63 = 81 × 9/63 × 9 = 729/567 - Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
- 630/567 < 729/567 or 90/81 < 81/63
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: