Compare 40/21 and 15/72
1st number: 1 19/21, 2nd number: 15/72
40/21 is greater than 15/72
Steps for comparing fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 72 is 504
Next, find the equivalent fraction of both fractional numbers with denominator 504 - For the 1st fraction, since 21 × 24 = 504,
40/21 = 40 × 24/21 × 24 = 960/504 - Likewise, for the 2nd fraction, since 72 × 7 = 504,
15/72 = 15 × 7/72 × 7 = 105/504 - Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
- 960/504 > 105/504 or 40/21 > 15/72
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