When someone reads a 252 page novel, 5 / 7 of the pages he has read is equal to 5 / 2 of the pages he has not read. Ask him how many pages he has read

When someone reads a 252 page novel, 5 / 7 of the pages he has read is equal to 5 / 2 of the pages he has not read. Ask him how many pages he has read

Read: not read = 5 / 2: 5 / 7 = 7:2
Number of pages read = 252 (7 + 2) × 7 = 196