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why this proportion that until two days ago gave me a correct value of 1800 Billion now gives me error?

36000000000:2=x:100

 Apr 21, 2020
edited by Guest  Apr 21, 2020
 #1
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+1

36E9 / 2 = x / 100, solve for x
cross multiply

36E11 = 2x
divide both sides by 2
x =36E11 / 2 =1,800,000,000,000

 Apr 21, 2020
 #2
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thanks for your kind reply; but I wanted to know why the scientific calculator gives me error?

36E9:2=x:100

 Apr 21, 2020

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