Scientific notation and percent

Question

Two percent of Jennies skin cells were burned when she escaped from a fire. If 3.7x10^10 of her skin cells were burned then, how many skin cells were not burned?

Answer 1

3.7 x10^10 were burned = 2%

total = 3.7/.02 x 10^10 = 185 x 10^10 = 1.85 x 10^12

98% were not burned = .98 x 1.85 x 10^12

= 1.813 x 10^12