Aria conducted a scientific experiment. For a certain time, the temperature of a compound rose 1\tfrac{1}{4}1
4
1
ā€‹
degrees every 1\tfrac{2}{3}1
3
2
ā€‹
hours. What was the rate, in degrees per hour, that the temperature of the compound rose? Enter your answer as a whole number, proper fraction, or mixed number in simplest form.