Grades 9-10 Video Solutions 2014-Levels 9&10 Video Solutions 2014 problem24

Levels 9&10 Video Solutions 2014 problem24

Video Transcription

Video Summary

On an island with only green and blue frogs, the number of blue frogs increased by 60% while green frogs decreased by 60%. The new ratio of blue to green frogs is the inverse of the original ratio. To find the percentage change in the total frog population, the expressions for new frog numbers are calculated, revealing that green frogs were initially twice as many as blue ones. Calculating the ratio of new to old total frog numbers gives 0.8, indicating a 20% net decrease in the total frog population. Thus, the overall frog population changed by 20%.

Keywords

frog population

ratio inversion

percentage change

green frogs

blue frogs