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QuestionMathematics

90 is 40% of what number?
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Answer

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Step 1:
I'll solve this step by step using the specified LaTeX formatting guidelines:

Step 2:
: Define the problem

Let's set up an equation where $$x$$ represents the unknown total number, and we know that 90 is 40% of this number.

Step 3:
: Convert the percentage to a decimal

0.40x = 90

Step 4:
: Solve for x by dividing both sides by 0.40

x = \frac{90}{0.40}

Step 5:
: Calculate the result

x = 90 \div 0.40 = 225

Step 6:
: Verify the solution

Let's check: $$0.40 \times 225 = 90$$ ✓

Final Answer

90 is 40% of 225.