< PSLE Study Guide
Sample question
80% of the fish in a tank were guppies and the rest were mollies. After 27 guppies and 12 mollies left the tank, 75% of the fish in the tank were guppies. Find the total number of fish in the tank at first.
This article is issued from Wikibooks. The text is licensed under Creative Commons - Attribution - Sharealike. Additional terms may apply for the media files.