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A city has reduced its carbon emissions by 20% over the last year. If the origin

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Question: A city has reduced its carbon emissions by 20% over the last year. If the original emissions were 500 tons, what are the current emissions?

Options:

  1. 400 tons
  2. 450 tons
  3. 500 tons
  4. 600 tons

Correct Answer: 400 tons

Solution: 

500 tons - (20/100 * 500) = 500 - 100 = 400 tons

A city has reduced its carbon emissions by 20% over the last year. If the origin

Practice Questions

Q1
A city has reduced its carbon emissions by 20% over the last year. If the original emissions were 500 tons, what are the current emissions?
  1. 400 tons
  2. 450 tons
  3. 500 tons
  4. 600 tons

Questions & Step-by-Step Solutions

A city has reduced its carbon emissions by 20% over the last year. If the original emissions were 500 tons, what are the current emissions?
  • Step 1: Identify the original carbon emissions, which is 500 tons.
  • Step 2: Calculate 20% of the original emissions. To do this, multiply 500 tons by 20/100.
  • Step 3: Perform the multiplication: 500 * 20/100 = 100 tons.
  • Step 4: Subtract the 20% reduction (100 tons) from the original emissions (500 tons).
  • Step 5: Perform the subtraction: 500 tons - 100 tons = 400 tons.
  • Step 6: The current carbon emissions are 400 tons.
  • Percentage Reduction – Understanding how to calculate a percentage decrease from a given value.
  • Basic Arithmetic – Performing subtraction and multiplication to find the final value.
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