First, look at the denominator.
in the fraction 23/25, the denominator is 25. A denominator is the number on the bottom of the fraction. 25 can easily be multiplied by 4 to get to 100, which will allow for an easy way to find the percentage.
Since we already know that 25 x 4 = 100, now we must do the same thing for the numerator, or the number on the top of the fraction.
23 x 4 = 92
Now we know that 23/25 = 92/100
therefore the answer is 92%
John gave 92% of his orange to his friend