Answers

Compare 90/84 and 70/64

1^st number: 1 6/84, 2^nd number: 1 6/64

90/84 is smaller than 70/64

Steps for comparing fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 84 and 64 is 1344
   
   Next, find the equivalent fraction of both fractional numbers with denominator 1344
2. For the 1st fraction, since 84 × 16 = 1344,
   90/84 = 90 × 16/84 × 16 = 1440/1344
3. Likewise, for the 2nd fraction, since 64 × 21 = 1344,
   70/64 = 70 × 21/64 × 21 = 1470/1344
4. Since the denominators are now the same, the fraction with the bigger numerator is the greater fraction
5. 1440/1344 < 1470/1344 or 90/84 < 70/64

MathStep (Works offline)

Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad

Related:

Compare Fractions Calculator