Continuing from Question $9$:

A high$-$production operation was studied during an $100-$hr period. During that time, a total of eleven equipment breakdowns occurred for a total lost production time of $1\mathrm{.}8hr,$ and the operation produced $42$ defective products. No setups were performed during the period. The operation cycle consists of a processing time of $3\mathrm{.}14$min, a part handling time of $0\mathrm{.}45$min, and a tool change is required every $40$ parts, which takes $1\mathrm{.}75$min.

Determine the scrap rate during the period.