Which of the following ratios is the highest?

Correct option is D

Solution:
​$$A: \frac{12}{19} = 0.6316\\\ \\B: \frac{15}{19} = 0.7895\\\ \\C: \frac{21}{26} = 0.8077\\\ \\D: \frac{19}{13} = 1.4615\\\ \\$$​​
The highest ratio is D (19 : 13), with a value of 1.4615.