Painful! Teach that writer some basic grammar. Yuk!
The company had imposed a contract that would cut its 19,000 workers' wages — 15,000 of whom belonged to the workers from the Bakery, Confectionery, Tobacco Workers & Grain Millers International Union (BCTGM) — by 8 percent. (The Teamsters was Hostess' largest union, followed by BCTGM.)
So, if 15K out of 19K workers are the SECOND largest union... How many are in the LARGEST?
This only works out if the unionistas are in both unions at once!