If 𝑎a is increased by 20% and 𝑏b is decreased by 20%, the resulting numbers will be equal. What is the ratio of 𝑎a to 𝑏b?
Question
If 𝑎a is increased by 20% and 𝑏b is decreased by 20%, the resulting numbers will be equal. What is the ratio of 𝑎a to 𝑏b?
Solution
Let's solve this step by step:
- If "a" is increased by 20%, it becomes 1.2a.
- If "b" is decreased by 20%, it becomes 0.8b.
- According to the problem, these two resulting numbers are equal. So, we can set up the equation 1.2a = 0.8b.
- To find the ratio of a to b, we need to isolate a/b. We can do this by dividing both sides of the equation by 1.2b. This gives us a/b = 0.8/1.2.
- Simplifying the right side of the equation gives us a/b = 2/3.
So, the ratio of a to b is 2:3.
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