Three percent of Barrys skin cells were burned when he escaped a fire. If 4.1 X 10^10 of his skin cells were burned then, how many skin cells were not burned?

Answer 1

You can use a ratio, let x = the unknown

Then,

(4.1 x 10¹⁰ cells)/3% = x/97% So, x = (4.1 x 10¹⁰)(97%/3%) = 132.6 x 10¹⁰