Out of the list of resistor tolerances below, which has the lowest precision?

In electronics, tolerance describes the acceptable manufacturing variance from the specified resistance value. A higher tolerance percentage means the resistor's actual value can fluctuate more widely from what is printed on it, resulting in lower overall precision. Out of the given options, 20% allows for the largest deviation from the stated value, making it the least precise component. Small percentages like 0.1% or 5% are tighter tolerances reserved for circuits requiring exact values.