Answer:
65%
Step-by-step explanation:
To find the percent of 6th graders who chose green as their favorite colors, you have divide 156 by 240, because this is saying of the whole (240), what was the part (those who chose green as their favorite color). The answer is a decimal, 0.65. To change this into a percent, change the decimal to a fraction over 100, and add a percent.
0.65 -> 65/100->65%