exam Maths Puzzle Numerical Ability

can someone help me with this! please! will it be 66%
A survey of 400 people found that 66 were left-handed. What percent
of those surveyed were left-handed?

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exam Other Question

P(4,0), m= -0.6

the problem asks me to find the equation in standard form using these points and the slope
graph the following equations

y=-1/3x + 4

3y-9x=30