 
 <translate> The total percentage of those who rated Excellent or Very Satisfactory is 15% + 60% = 75%. Seventy - five percent of the parents is 120 x 75 / 100 = 90. Hence, 120 - 90 = 30 students rated either Satisfactory or Needs Improvement. A total of 30 x 80 / 100 = 24 parents rated Satisfactory. Therefore, 30 - 24 = 6 parents rated Needs Improvement.
The answer: 6. <ibo> Onu ogugu nke ndi lere anya nke oma ma obu nke oma bu 15% + 60% = 75%. Pasent 75 nke ndị nne na nna bụ 120 x 75 / 100 = 90. N'ihi ya, ụmụ akwụkwọ 120 - 90 = 30 kwuru na ha nwere afọ ojuju ma ọ bụ na ha chọrọ imeziwanye ihe. Ọnụ ọgụgụ nke ndị nne na nna 30 x 80 / 100 = 24 kwuru na ha nwere afọ ojuju. N'ihi ya, 30 - 24 = nne na nna 6 kwuru na e kwesịrị imeziwanye ihe. Azịza ya bụ: 6. 