Final answer:
The carpenter has completed 70% of the chairs, as determined by dividing the number of chairs completed (14) by the total number of chairs (20) and then multiplying by 100%.
Step-by-step explanation:
The question is about finding what percentage of the chairs a carpenter has completed if he built 14 out of the 20 chairs he needed to finish. To determine this, we use the formula for percent completed, which is (Number of items completed ÷ Total number of items) × 100%.
In this case, the carpenter has completed 14 chairs out of 20, so the calculation is (14 ÷ 20) × 100%.
First, divide the number of chairs completed by the total number of chairs: 14 ÷ 20 = 0.7. Then, multiply by 100 to convert the fraction into a percentage: 0.7 × 100% = 70%.
Therefore, the carpenter has completed 70% of the chairs.