SOLUTION: Please help with this if I got 77+81 and my promotion mark was 80% what would my promotion mark be if I got 89+81 percentage required please

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Question 1013289: Please help with this if I got 77+81 and my promotion mark was 80% what would my promotion mark be if I got 89+81 percentage required please
Answer by MathLover1(20850) About Me  (Show Source):
You can put this solution on YOUR website!

if 77%2B81+=158 and promotion mark was 80%
then 89%2B81+=170 was x%
since proportional, we have
+158%2F170=80%2Fx
158x=80%2A170
158x=13600
x=13600%2F158
x=86.08%