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KATRIN_1 [288]
3 years ago
7

On a factory floor, 30 out of every 140 toy robots is defective. What percent is defective?

Mathematics
1 answer:
yaroslaw [1]3 years ago
5 0

Answer:

21.43\%

Step-by-step explanation:

we know that

To find out the percent of robots which are defective, divided the number of defective robots by the total number of robots and multiply the result by 100

Let

x ----> the number of defective robots

y ----> the total number of robots

p ---> percentage of robots which are defective

so

p=\frac{x}{y} (100)

we have

x=30\\y=140

substitute

p=\frac{30}{140}(100)

p=21.43\%

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<u>Step-by-step explanation:</u>

Here we have , Every day 10% of the liquid present in the morning in Kyle's open container will evaporate. At the end of three days, We need to find what percent of the original amount of liquid remains in Kyle's container . Let's find out:

Let's suppose initially we have 100% of liquid present so ,

<u>At day 1:</u>

10% of the liquid present(100%) in the morning in Kyle's open container will evaporate , So left is :

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<u>At day 3:</u>

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Convert mixed number to improper fraction

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Step 1 of 2: Divide, sub-step b: Divide.

Divide

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÷ 7 over 8

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8

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49

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× 8 over 7

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7

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To divide fractions, invert the second one (turn it upside-down), then multiply the numerators and denominators.Divide

12 and 1 over 412

1

4

÷ 7 over 8

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= 392 over 28

392

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Step 1 of 2: Divide, sub-step a: Convert mixed number to improper fraction.

Convert mixed number to improper fraction

12 and 1 over 412

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4

= ( 12 × 4 ) over 4

12 × 4

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Step 1 of 2: Divide, sub-step b: Divide.

Divide

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