Final answer:
To find out how many pupils joined the educational trip, 85% of 680, which is the total number of enrolled pupils, is calculated, resulting in 578 pupils who joined the trip.
Step-by-step explanation:
To calculate the number of students who joined the educational trip, we need to apply the percentage to the total number of pupils. Since 85% of the learners joined the trip and there are 680 pupils enrolled, we multiply 680 by 85% (or 0.85).
The calculation would be as follows:
680 pupils Ă— 0.85 = 578 pupils
Thus, 578 pupils from the school joined the educational trip.