Question
In a parade square, 18 of the pupils wore sweaters. After 220 pupils who wore sweaters entered the parade square, the percentage of pupils who wore sweaters increased to 75%. How many pupils in the parade square did not wear sweaters?
2 m

Click button first when a symbol is required. X

In a parade square, 18 of the pupils wore sweaters. After 220 pupils who wore sweaters entered the parade square, the percentage of pupils who wore sweaters increased to 75%. How many pupils in the parade square did not wear sweaters?