To solve for the percentage increase of the cost of jacket, calculate first for the increase, divide it by the original price and then multiply by 100%. This is shown below.
The GCF is 6. Prime factors of 42 = 2,3,7Prime factors of 2430 = 2,35,5Common prime factors: 2 ,3Common prime factors with the lowest exponent: 2^1, 3^1