A total of 907 went to a fishing tournament. Of these people, 626 arrived before noon. Alina estimates that fewer that 300 people arrived in the afternoon. How did she estimate? Explain.

She estimated by rounding 907 - > 900 and 626 - > 630 and when you subtract them, you get 270, which is how she estimated >300 people would arrive in the afternoon

Alina probably subtracted 626 from 907, and got 281, which is the amount of people that got there in the afternoon. 281 is pretty close to 300 so that is how she found the answer and estimated