There are 300 students at a school who have been asked to attend assembly. 1/10 students are sat on chairs, 85% of students are sat on the floor, the rest do not attend assembly. How many students did not attend assembly?
300 x 1/10
= (300/10) x 1
= 30 students sat on chairs
85% of 300
= (300/10) x 8.5
= (30 x 8) + (30 x 0.5)
= 240 + 15
= 255 students sat on the floor
Students who did not attend = 300 - 30 - 255
= 15
