Step-by-step explanation:
Let 25% of x be 13
[tex] \therefore \: \frac{25}{100} \times x = 13 \\ \\ \therefore \: \frac{1}{4} \times x = 13 \\ \\ \therefore \: x = 13 \times 4 \\ \\ \therefore \: x = 52[/tex]
Hence, 25% of 52 is 13.
