Question

help me with question


from the above piechart
$find \: the \: percent \: of \: students \: that \: are \: in \: grade7$
Need ✔ solution

Answer 1

Hi friend!

$<marquee direction="right" behavior="alternate"><big><big><b>Answer:</b></big></big></marquee>$

Percentage of students that are in Grade 7.
First we have to find out the amount of students (in this case, we have the angle)

We know that a circle has 360°.
Grade 8 = 120°
Grade 6 = 60°
Grade 7 = Total - Other

Total = 360°
Other = 120° + 60° = 180°
360° - 180° = 180°

Percentage that 180° is of 360°:

Formula:
$\frac{Value}{Total} \times 100$

$= \frac{180}{360} \times 100 \\ = \frac{1 \times 100}{2} \\ = 50\%$

Therefore, there are 50% students studying in Grade 7.

Hope you found my answer helpful. Keep Smiling!

Answer 2

$from \: the \: above \: pie \: chart \\ we \: see \: that \: \\ the \: whole \: angle \: of \: whole \: pie \\ chart \: is \: 360 \: degree \\ the \: angle \: of \: grade \: 8 \: in \: pie \: chart \: is \: 120 \: degree \\ and \: the \: angle \: of \: grade \: 6 \: in \: pie \: chart \: is \: 60 \: degree \\ therefore \: \: \: \: \: grade \: 6 + grade \: 7 + grade \: 8 \: = \: 360 \\ = > 60 + grade \: 7 + 120 \: = \: 360 \\ = > grade \: 7 \: = \: 180 \: degree \\ as \: 360 \: is \: twice \: of \: 180 \\ therefore \: grade \: 7 \: has \: 50 \: percent \: students$