100% of what? In principle with favorable winds a large merchant ship could cross an entire ocean using sail power, but it would be very slow. Due to capital expenses, crew wages, and customer demands that wouldn't be economically viable. Even with "slow steaming" to save on fuel, merchant ships on long crossings are generally cruising at least 13 knots. There's no way to consistently hit such a high speed on a large vessel with any practical sail rig.