Compare 28/72 and 21/25
28/72 is smaller than 21/25
Steps for comparing fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 72 and 25 is 1800
Next, find the equivalent fraction of both fractional numbers with denominator 1800 - For the 1st fraction, since 72 × 25 = 1800,
28/72 = 28 × 25/72 × 25 = 700/1800 - Likewise, for the 2nd fraction, since 25 × 72 = 1800,
21/25 = 21 × 72/25 × 72 = 1512/1800 - Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
- 700/1800 < 1512/1800 or 28/72 < 21/25
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