Total Students is 40 and absents are 4
Students Present = 40 - 4 = 36
Numerator should be the term whose percentage is to be found while denominator is the total kf commodity and the result will be multiplied by 100.
so = 36/40 x 100
simplify the above term = 9/10 x 100 = 90%
Similarly % of absent students = 4/40 x 100 = 10%.
Therefore 90% of students attended the meeting.