Answer:
He needs to finish 63 pages.
Step-by-step explanation:
Let the total number of pages he has to read = x,
The percentage of the book he has finished = 70%,
Thus, the number of pages he has finished = 70% of 147,
\(=\frac{70x}{100}\)
According to the question,
\(\frac{70x}{100}=147\)
\(70x=14700\)
\(x=\frac{14700}{70}=210\)
Hence, the remaining pages he needs to read = total pages - pages which are finished
= 210 - 147
= 63
