Answer:
Let's use the equation:
Total earnings = Base pay + Commission
Xavier's base pay is $150 per day, and his commission is x percent of his daily sales, which is $1250 in this case. Therefore, we can write the equation as:
$200 = $150 + (x/100) * $1250
Simplifying the equation:
$200 - $150 = (x/100) * $1250
$50 = (x/100) * $1250
Dividing both sides by 1250:
0.04 = x/100
Multiplying both sides by 100:
x = 4
Therefore, the commission percentage for Xavier on that day was 4%.