Calculation assuming a uniform work rate: Total duration = \(6 \div 0.7 \approx 8.57\) months Time for the remaining 30% = \(8.57 \times 0.3 \approx 2.57\) months
Note: In reality, the final 30% is often more difficult and usually takes longer than 2.57 months.
Answer: Approximately 2.57 months at a constant pace.