$38\%$ of $341 = $x$

### Concept & Formula To find a specific percentage of a number, convert the percentage into a decimal (or fraction) and multiply it by the given number. $$ \text{Value} = \frac{P}{100} \times N $$ ### Step-by-Step Solution * **Given:** We need to calculate $38\%$ of the number $341$. * **Calculation:** Convert $38\%$ to the decimal $0.38$. $$ 0.38 \times 341 $$ $$ = \frac{38}{100} \times 341 $$ $$ = \frac{12958}{100} $$ $$ = 129.58 $$ ### Exam Strategy & Shortcut Use the unit digit technique for quick verification. Ignore the decimals temporarily and look at the last digits of the multiplication: $8 \times 1 = 8$. The final answer must end in $.x8$. While multiple options end in $.8$, you can use approximation to narrow it down: $40\%$ of $340$ is $4 \times 34 = 136$. Since $38\%$ is slightly less than $40\%$, the answer must be slightly less than $136$. Therefore, $129.58$ is the only logical choice. ### Common Pitfall Performing full manual multiplication without estimating first, which consumes valuable exam time. Always approximate first to see if you can eliminate options immediately. ### Final Answer **Therefore, the correct answer is 129.58.**