Justin is reading a book that has 276 pages. He already read some pages of it last week. He plans to read 20 pages tommorow. By then, he will be 2/3 of way through the book. How many pages did Justin read last week?
184 read by that time 2/3=0.666666666666667*276=184
Divide 276 by 3 to get 92. Then add 92 and 92 to get 184 which is 2/3 of 276. Then subtract 20 to get 164. He read 164 pages last week. I am pretty sure this is right. Hope this helps!!!