Question

There are 80 students in a speech contest. Yesterday 1/4 of them gave their speeches. Today 2/5 of the remaining students gave their speeches. How many students still haven't given their speeches?

Answer 1

so 80 total
1/4 gave speeches or 20 gave speeches
80-20=60
today 2/5 of 60 gave speeches

2/5 of 5=60 is the same as
2/5 times 60=120/5=24 who gave speeches

60-24=36

36 haven't give their speeches