Answer:
35% of the students said they like red
Explanation:
If there is 140 total students and 91 students said their favorite color was purple then subtract 140 from 91 to find the left over students who chose red
140-91 = 49
49 students said their favorite color is red
91 students said their favorite color was purple
49/140 is equal to 0.35
0.35 is 35%
35% of the students said they like red