Compare 21/70 and 3/28
21/70 is greater than 3/28
Steps for comparing fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 70 and 28 is 140
Next, find the equivalent fraction of both fractional numbers with denominator 140 - For the 1st fraction, since 70 × 2 = 140,
21/70 = 21 × 2/70 × 2 = 42/140 - Likewise, for the 2nd fraction, since 28 × 5 = 140,
3/28 = 3 × 5/28 × 5 = 15/140 - Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
- 42/140 > 15/140 or 21/70 > 3/28
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