Compare 42/21 and 30/4
1st number: 2 0/21, 2nd number: 7 2/4
42/21 is smaller than 30/4
Steps for comparing fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 4 is 84
Next, find the equivalent fraction of both fractional numbers with denominator 84 - For the 1st fraction, since 21 × 4 = 84,
42/21 = 42 × 4/21 × 4 = 168/84 - Likewise, for the 2nd fraction, since 4 × 21 = 84,
30/4 = 30 × 21/4 × 21 = 630/84 - Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
- 168/84 < 630/84 or 42/21 < 30/4
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