Answer :
5 to 3 because the question 1250 to 750 is simplified to its simplest form. Just change the question into a fraction 1250/750 and simplify.
The Ratio of 1250:750 can be divided by ten, which will give 125:75. As these are both multiples of 25, this can be simplified further to 5:3
Hope this helps :)
Hope this helps :)