When specifying the tolerance of a precision resistor in English, one would express the error as being within negative and positive 0.01 percent. This can be succinctly written as ±0.01%. The plus-minus sign (±) indicates that the actual resistance value may vary by up to 0.01% above or below the stated value. This level of accuracy is indicative of high-precision resistors used in critical applications where small variations can significantly impact performance.