Hey there!
About 33 people were working for the wage of $12 but then that number amplified to about $18. The balance number decreased and it began to moderate to about 18. Since , we decreased we have to subtract the number of working people working from the moderated amount
So
33 - 18 = 15
Thus, your answer is: 15
Good luck on your assignment and enjoy your day!
~LoveYourselfFirst:)