There are nine different types of bacteria on the Petri dish.

A drawing shows some colonies of bacteria on the Petri dish. The number of bacteria in different colonies is as follows: Colony 1, 2 bacteria; colony 2, 1 bacteria; colony 3, 7 bacteria; colony 4, 4 bacteria; colony 5, 1 bacteria; colony 6, 1 bacteria; colony 7, 1 bacteria; colony 8, 1 bacteria; colony 9, 1 bacteria.

What percent of the bacteria on the Petri dish is of type 3?

37 percent of the bacteria on the Petri dish is type 3

The percent of bacteria on the Petri dish of type 3 will be 36.84%.

The amount of any product is given as though it was a proportion of a hundred. The ratio can be expressed as a quarter of 100. The phrase % translates for one hundred percent. It is symbolized by the character '%'.

The percentage is given as,

Percentage (P) = [Final value - Initial value] / Initial value x 100

There are nine different types of bacteria on the Petri dish.

A drawing shows some colonies of bacteria on the Petri dish. The number of bacteria in different colonies is as follows:

Colony  bacteria

     1          2

    2          1

    3          7

    4          4

    5          1

    6          1

    7          1

    8          1

    9          1

Then the percent of the bacteria on the Petri dish of type 3 will be given as,

P = [7 / (2 + 1 + 7 + 4 + 1 + 1 + 1 + 1 + 1)] x 100

P = (7 / 19) x 100

P = 36.84%

The percent of bacteria on the Petri dish of type 3 will be 36.84%.

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