Final answer:
To find the number of students who still need to do their science projects, subtract the number of students who have completed their projects from the total number of students.
Step-by-step explanation:
To find the number of students who still need to do their projects, we first need to calculate the number of students who have completed their projects. We know that 76% of the students have completed their projects, so we can calculate this as 76% of 25 students:
Number of students who have completed their projects
= 76% × 25 students
= 0.76 × 25
= 19 students
To find the number of students who still need to do their projects, we subtract the number of students who have completed their projects from the total number of students:
Number of students who still need to do their projects = Total number of students - Number of students who have completed their projects
= 25 students - 19 students
= 6 students