The first ratio of chocolate to total students preference is 50/200. If there are approximately 1000 students, then we can find the new ?/1000 ratio by multiplying the denominator or total to get 1000
200×5=1000, so we would have to multiply thr numerator as well because you have to multiply noth the top and bottom to have an equal ratio . 50×5= 250.
The new ratio for chocolate preference to the total is 250/1000, which just means that 250 of the total 1000 students prefer chocolate ice cream