Final answer:
Without the original subscription cost of Ms. Sellis’s Hulu service, the exact percent increase cannot be calculated. An example with a hypothetical original cost shows how one would calculate the percent increase following a specific formula.
Step-by-step explanation:
To calculate the percent increase of Ms. Sellis's Hulu subscription cost over three years, we initially need her original annual cost. Since this information is not provided, we cannot provide an exact percentage. However, if the original amount is known, the calculation follows the formula: Percent Increase = ((New Total - Original Total) / Original Total) × 100%. Given the total paid over three years is $5089.56, if we had the original annual cost (let's call it 'O'), the new annual cost would be $5089.56 / 3, and the increase could be calculated by comparing the new annual cost with the original 'O'.
For example, if originally Ms. Sellis paid $1000 per year, the new annual cost after the price increase would be $5089.56 / 3 = $1696.52. The percent increase from $1000 to $1696.52 would be (($1696.52 - $1000) / $1000) × 100% = 69.652%, which is approximately 70% when rounded to the nearest percent.