Answer:
40% of the dresses are for films not set in the 1700s.
Step-by-step explanation:
To find the percentage of dresses for films set in the 1700s, we multiplied the fraction (3/5) by 100% to convert it to a percentage.To find the percentage of dresses not set in the 1700s, we subtracted the percentage for the 1700s from 100%. This is because the total percentage should add up to 100%, and if 60% are for the 1700s, then the remaining percentage is for films not set in the 1700s.