A collector has 50 movie posters and 40 band posters. She wants to sell 20 movie posters but still have her poster collection maintain the same ratio of 50:40. If she sells 20 movie posters, how many band posters should she sell? Complete the explanation to find out how many band posters she should sell.
Her current ratio of movie posters to band posters is 50:40. If she sells 20 movie posters, she will have
left. 5040 = 30 , so she should sell band posters.