By providing 50% soffit ventilation on both soffit overhangs, that will feed air 100% to ridge ventilation at the peak.
Below are some pictures of 2 inch strip ventilation being cut into wood soffits.
Below you will see pictures of opening ventilation and installing fully ventilated vinyl soffit panels.
Please remember that there ARE some soffits that can not take vents, which is okay.
Home Insulation of Syracuse 