To find 100% when 45 is 75%, we can set up a proportion:

\[
\frac{45}{75} = \frac{x}{100}
\]

Now solve for \( x \) (which represents 100%):

1. Cross-multiply:
\[
45 \times 100 = 75 \times x
\]
\[
4500 = 75x
\]

2. Solve for \( x \):
\[
x = \frac{4500}{75} = 60
\]

So, 100% is 60.

Would you like more details on this method or have any other questions?

Here are 5 related questions you could explore:
1. What is 50% of 60?
2. How do you calculate percentages using proportions?
3. If 30 is 50%, what is 100%?
4. What percentage is 24 of 60?
5. How can you use percentage increase or decrease in daily situations?

**Tip:** To quickly find percentages, always remember that \( \frac{part}{whole} = \frac{percent}{100} \).

Learn how to calculate 100% when 45 is given as 75% using simple proportion methods. This step-by-step guide covers cross multiplication and percentage concepts, suitable for students in Grades 5-7.

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