5 times
Step-by-step explanation:
Take the numbers 6.25, 10, 0.75, out of the question.
Subtract 6.25 from 10 (10 - 6.25 = 3.75)
Divide 0.75 from 3.75 (3.75 ÷ 0.75 = 5)
They refilled their popcorn 5 times.