Answer:
Understanding basic business math is necessary for profitable operations and accurate record keeping. Knowing how to add, subtract, multiply, divide, round and use percentages and fractions is the minimum you need to price your product and meet your budget.
It is given in the question that
You work at a T-shirt printing business. Of 1,300 T-shirts shipped, 106 are imperfect.
So out of 1300 T-shirts, number of perfect t-shirts are

So probability that the t-shirt is printed correctly is

And to find the percentage, we have to multiply it by 100, and on doing so we will get 92 % .
You will divide the 12 by 28: 12/28 and that equals 3/7