Compare 21/15 and 90/80
1st number: 1 6/15, 2nd number: 1 10/80
21/15 is greater than 90/80
Steps for comparing fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 15 and 80 is 240
Next, find the equivalent fraction of both fractional numbers with denominator 240 - For the 1st fraction, since 15 × 16 = 240,
21/15 = 21 × 16/15 × 16 = 336/240 - Likewise, for the 2nd fraction, since 80 × 3 = 240,
90/80 = 90 × 3/80 × 3 = 270/240 - Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
- 336/240 > 270/240 or 21/15 > 90/80
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