The percentage of the narrow-ruled notebooks that were 1-subject is 49%.
How I found this answer: The total amount of narrow-ruled notebooks is 209. There are 102 1-subject narrow-ruled notebooks. Therefore, it is 102/209. Divide. 102 divided by 209 = 0.488038278 The problem asked to round to the nearest percent, which would be 49%.
If you need anymore further explanation, feel free to contact me. Best of luck to you!
