Question

numa classe de 35 alunos faltaram 7 qual a taxa porcentual de alunos presentes ?

Answer 1

35---->100%
27----> x
x= 27*100/35= 2700/35= 77,14

Answer 2

35-100
 x-7

x=700/35
x=20
20%faltaram
80%estavam presente