Answer:
the answer is d because there is 50 slices of pizza now it is 20 slices is left so this means 50 slices -20 slices= 30 slices from 50 slices so when u change into % 30 over 50 times 2 over 2 to get the denominator 100 the qnswer will be 60 over 100 that means 60%