### Database Schema:
CREATE TABLE connected (
	atom_id	TEXT	NOT NULL	PRIMARY KEY,
	atom_id2	TEXT	NOT NULL	PRIMARY KEY,
	bond_id	TEXT	NULL	DEFAULT NULL,
	foreign key (atom_id2) references atom (atom_id),
	foreign key (atom_id) references atom (atom_id),
	foreign key (bond_id) references bond (bond_id)
);

CREATE TABLE atom (
	atom_id	TEXT	NOT NULL	PRIMARY KEY,
	molecule_id	TEXT	NULL	DEFAULT NULL,
	element	TEXT	NULL	DEFAULT NULL,
	foreign key (molecule_id) references molecule (molecule_id)
);

CREATE TABLE bond (
	bond_id	TEXT	NOT NULL	PRIMARY KEY,
	molecule_id	TEXT	NULL	DEFAULT NULL,
	bond_type	TEXT	NULL	DEFAULT NULL,
	foreign key (molecule_id) references molecule (molecule_id)
);

CREATE TABLE molecule (
	molecule_id	TEXT	NOT NULL	PRIMARY KEY,
	label	TEXT	NULL	DEFAULT NULL
);

### User's Query:
Calculate the percentage of carcinogenic molecules with triple bonded Hidrogen atoms.

### Extra Knowledge:
hydrogen refers to element = 'h'; label = '+' mean molecules are carcinogenic; triple bond refers to bond_type = '#'; percentage = DIVIDE(SUM(label = '+'), COUNT(molecule_id)) * 100.0 where element = 'h' AND bond_type = '#';
SELECT CAST(SUM(CASE WHEN T1.label = '+' THEN 1 ELSE 0 END) AS REAL) * 100 / COUNT(DISTINCT T1.molecule_id) FROM molecule AS T1 INNER JOIN atom AS T2 ON T1.molecule_id = T2.molecule_id INNER JOIN bond AS T3 ON T1.molecule_id = T3.molecule_id WHERE T3.bond_type = '#' AND T2.element = 'h'