#include <iostream>
#include <cmath>
using namespace std;
 
int main()
{
	int n; cin >> n;
 
	while (n--)
	{
		double x, y; cin >> x >> y;
		double l = x - y; double al = abs(l);
		double r = x + y; double ar = abs(r);
 
		if (l * r < 0) { cout << 0 << endl; continue; }
		if (1.0 <= ar) { cout << (int)l << endl; continue; }
		if (l < 0) swap(al, ar);
 
		bool hit = false;
		int nn, dd;
		for (int i = 1.0 / ar; !hit; ++i)
		{
			for (dd = 1; dd < i; ++dd)
			{
				nn = i - dd;
				double num = (double)nn / dd;
				if (al <= num && num <= ar) { hit = true; break; }
			}
		}
		cout << ((l < 0) ? "-" : "") << nn << "/" << dd << endl;
	}
 
	return 0;
}
 

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NQowLjMgMC4xCjAuNSAwLjIKLTAuMyAwLjEKMC4wNyAwLjAyCjAuMDAwMDAwMDEyMyAwLjAwMDAwMDAwMDMK

5
0.3 0.1
0.5 0.2
-0.3 0.1
0.07 0.02
0.0000000123 0.0000000003