100-25%=

To calculate 100 - 25%, you first need to find 25% of 100.

25% of 100 is:

\[ 25\% \times 100 = \frac{25}{100} \times 100 = 25 \]

Now, subtract that from 100:

\[ 100 - 25 = 75 \]

So, 100 - 25% = 75.