69839.28 decreased by 7.6% = 64531.49472.
Step 1: Find 7.6 percent of 69839.28.
$$ 7.6 \% \text{ of } 69839.28 = 0.076 \cdot{ 69839.28 } = \color{blue}{ 5307.78528 }$$Step 2: Decrease original amount 69839.28 by 5307.78528.
$$ 69839.28 - 5307.78528 = 64531.49472.$$