Help me in solving PPSC41B problem

help
,
1

My issue

what is the wrong step I have done here?

My code

#include<stdio.h>
int main(){
    int f = 49;
    float c = ((f - 32) *5) / 9;
    printf("%.6f\n", c);
    
    return 0; 
}

Learning course: Programming and Problem solving using C
Problem Link: https://www.codechef.com/learn/course/ciet-programming-c/CIETPC09/problems/PPSC41B