Compare 81/70 and 30/20
1st number: 1 11/70, 2nd number: 1 10/20
81/70 is smaller than 30/20
Steps for comparing fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 70 and 20 is 140
Next, find the equivalent fraction of both fractional numbers with denominator 140 - For the 1st fraction, since 70 × 2 = 140,
81/70 = 81 × 2/70 × 2 = 162/140 - Likewise, for the 2nd fraction, since 20 × 7 = 140,
30/20 = 30 × 7/20 × 7 = 210/140 - Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
- 162/140 < 210/140 or 81/70 < 30/20
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