What is 80% of 4.47x10^17th???

Question

What is 80% of 4.47x10^17th???

Answer 1

Multiply .8 by 4.47 (with a calculator or on paper).  You should get 3.576.  Basic calculators can't handle exponential notation, or 17 digits, so just leave off the factor of 10^17 and add it back on after you do the math on the significant figures.

Of course, if the decimal point changes, you need to change the exponent if you want to leave the answer in scientific notation.  For instance, 20% of 4.47x10^17 would be 8.94x10^16.

Most calculators will do percentages by punching in 80 % X 4.47 =, or 4.47 X 80 % =.

Answer 2

I don't have a calculator on me, but it would be 447,000,000,000,000,000 (or 4.47x10^17) times .8

just plug it i and let the calculator do the work