Compare 81/20 and 90/7
1st number: 4 1/20, 2nd number: 12 6/7
81/20 is smaller than 90/7
Steps for comparing fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 7 is 140
Next, find the equivalent fraction of both fractional numbers with denominator 140 - For the 1st fraction, since 20 × 7 = 140,
81/20 = 81 × 7/20 × 7 = 567/140 - Likewise, for the 2nd fraction, since 7 × 20 = 140,
90/7 = 90 × 20/7 × 20 = 1800/140 - Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
- 567/140 < 1800/140 or 81/20 < 90/7
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