There are several first, second and third prizes in the "June 1" talent show. The first and second prizes account for 12% of the total number of winners. The second and third prizes account for 45% of the total number of winners. What percentage of the first, second and third prizes account for?
The proportion of the first prize: 1-45 = 15, the second prize: 12-15 = 310, the third prize: 1-12 = 12, a: the first prize, the second prize and the third prize each account for 15310, 12