Answer:
200
Explanation:
25% is equal to a quarter, therefore a quarter of all teachers teach basic maths. If there are 50 who teach basic maths, multiplying it by 4 will give the total number of teachers.
50 x 4 = 200
To check it divide 200 by 4, to get a quarter of teachers, and that will be the number of basic maths teachers.
200 / 4 = 50