Question
In a tuckshop, 13 of the pupils wore scarves. After 77 pupils who wore scarves entered the tuckshop, the percentage of pupils who wore scarves increased to 80%. How many pupils in the tuckshop did not wear scarves?
2 m

Click button first when a symbol is required. X

In a tuckshop, 13 of the pupils wore scarves. After 77 pupils who wore scarves entered the tuckshop, the percentage of pupils who wore scarves increased to 80%. How many pupils in the tuckshop did not wear scarves?