1. The question "how is it 1 tho?" suggests you want to understand why a certain value equals 1. 2. Without a specific problem, let's consider a common example: why is $\frac{a}{a} = 1$ for any nonzero $a$? 3. The formula used is division of a number by itself: $$\frac{a}{a} = 1$$ 4. Important rule: division by zero is undefined, so $a \neq 0$. 5. Intermediate step showing cancellation: $$\frac{\cancel{a}}{\cancel{a}} = 1$$ 6. Explanation: When you divide a number by itself, the numerator and denominator are the same, so they cancel out, leaving 1. 7. This is why expressions like $\frac{5}{5}$, $\frac{x}{x}$ (for $x \neq 0$), or $\frac{100}{100}$ all equal 1. 8. If you have a specific expression in mind, please provide it for a detailed explanation.