To find the percentage increase, first find the difference between the two prices:
$9.62 - $9.53 = $0.09
Then, divide the difference by the original price:
$0.09 ÷ $9.53 = 0.0094
Finally, multiply by 100 to convert to a percentage and round to the nearest tenth of a percent:
0.0094 × 100 ≈ 0.9%
Therefore, the percentage increase is approximately 0.9%.