> was it only the 10% fringe farmers protesting? or the 90% majority of farmers?

Short of the hong-kong protests, I don't think there were any recent protests that has double-digit percent attendance numbers. For instance, wikipedia says that for the BLM protests, "between 15 million and 26 million people had participated at some point in the demonstrations in the United States, making the protests the largest in U.S. history". That means, the largest protest in the US only has between 4.6%-7.9% attendance.

edit: whoops forgot link https://en.wikipedia.org/wiki/George_Floyd_protests