So if 6 out of 40 are incorrect, 40-6= 36 must be correct.
In order to gain percentage you do proportions.
36/40 = x/100.
Multiply 36 times 100 then divide by 40, which is 90.
The answer is 90%.
90% of the questions he got were correct.
Answer:
the picture is not clear can you take a new picture so I can help.
Step-by-step explanation:
Well if 1 is 20 square inches then times 20 X 30 which equals 600. So the area is 600 square inches.
