Compare 72/80 and 42/70
72/80 is greater than 42/70
Steps for comparing fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 80 and 70 is 560
Next, find the equivalent fraction of both fractional numbers with denominator 560 - For the 1st fraction, since 80 × 7 = 560,
72/80 = 72 × 7/80 × 7 = 504/560 - Likewise, for the 2nd fraction, since 70 × 8 = 560,
42/70 = 42 × 8/70 × 8 = 336/560 - Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
- 504/560 > 336/560 or 72/80 > 42/70
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