To decrease an amount by 18%, what single multiplier would you use?

Can someone check my answer? you

2x - 20 = 32 20 - 3x = 8 6x - 8 = 16 -13 - 3x = -10

An office supply company conducted a survey before marketing a new paper shredder designed for home use. in the survey, 80 % of the people who tried the shredder were satisfied with it. because of this high satisfaction rate, the company decided to market the new shredder. assume that 80 % of all people are satisfied with this shredder. during a certain month, 100 customers bought this shredder. find the probability that of these 100 customers, the number who are satisfied is 69 or fewer.