Final answer:
To calculate a 15% tip for Kerri's meal costing $8.40, we convert the percentage to a decimal (0.15) and multiply it by the cost of the meal, resulting in a tip amount of $1.26.
Step-by-step explanation:
To calculate the tip that Kerri should leave for her meal, we first need to convert the tip percentage into a decimal form. To convert 15% to a decimal, we divide by 100, resulting in 0.15. Next, we multiply the cost of the meal ($8.40) by 0.15 to find the amount of the tip. Tip calculation: 0.15 × $8.40 = $1.26 .Therefore, Kerri should leave $1.26 as a 15% tip for her meal.