% means per 100
so when figuring out percents it's good to use 100
so
on $100 7% would mean $7
on $50 7% would mean $3.5
in $200 7% would mean $14
33-23=10. 10+23=33. 23-10=13
the numbers are 23 and 10
the answer is D
reason: ration of freshmen to sophmores is 17 to 19, for other way around, flip the num ber
Dat means 18+'a number'
aka
18+x