Properly calculating sum to percentage with rounding error to +-1%

sumpercentage

float a = 221, b = 77, c = 17, d = 88, e = 22, f = 44;
		float total = a + b + c + d + e + f;
		int sum = (int) Math.round(100.0 / total * a)
				+ (int) Math.round(100.0 / total * b)
				+ (int) Math.round(100.0 / total * c)
				+ (int) Math.round(100.0 / total * d)
				+ (int) Math.round(100.0 / total * e)
				+ (int) Math.round(100.0 / total * f);
		System.out.println(Math.round(100.0 / total * a));
		System.out.println(Math.round(100.0 / total * b));
		System.out.println(Math.round(100.0 / total * c));
		System.out.println(Math.round(100.0 / total * d));
		System.out.println(Math.round(100.0 / total * e));
		System.out.println(Math.round(100.0 / total * f));
		System.out.println(sum);