Compare 70/20 and 81/42
1st number: 3 10/20, 2nd number: 1 39/42
70/20 is greater than 81/42
Steps for comparing fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 42 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 20 × 21 = 420,
70/20 = 70 × 21/20 × 21 = 1470/420 - Likewise, for the 2nd fraction, since 42 × 10 = 420,
81/42 = 81 × 10/42 × 10 = 810/420 - Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
- 1470/420 > 810/420 or 70/20 > 81/42
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