Something about SHA224

[stenliterziev]

Good evening, gentlamens. I would like to know how can i crack a SHA decrypt from the sort of 
1807c4d28dc1ce22f0b359366bf4faea6932fedd366cb78258c26ffb

This hash in ecrypted means the number 0.70

I would like to know how i can decrypt this sort of hash and find the number from 0.01 to 0.99. I dont need letters, i need numbers.