Which of the following ratios is greatest?

Correct option is B

Given:

Ratios to compare: 41 : 64, 50 : 59, 40 : 70, 26 : 90

Solution:

​$$\frac{41}{64}=0.640625,\quad\frac{50}{59}\approx0.84746,\quad\frac{40}{70}=\frac{4}{7}\approx0.57143,\quad\frac{26}{90}=\frac{13}{45}\approx0.28889$$ 

Since (0.84746) is the largest, the greatest ratio is 50 : 59.