Answer:
-3/4, -2/5, -4/15
Explanation:
using calculator, -3/4 = -0.75, -4/15 = -0.266666..., -2/5 = -0.40
imagine that -0.75, -0.26... and -0.40 are temperatures
the coolest temperature is -0.75, the warmest one is -0.26...
so the least number is -0.75, greater -0.40 and the greatest -0.26...