Asked by Erika

Suppose in the early 1900s the levels of CO2 in the atmosphere was only 64% of the levels of CO2 today. What percentage more is the level of CO2 today compared to the levels of CO2 in the early 1900s?
Answered by Damon
x in 1900
y in 2015

x = .64 y
so
y = 1.56 x
so y now is 156 percent of x
which is an increase of 56 percent
Answered by Erika
How did you get y=1.56x?

Answered by George
100/64= 1.5625
subtract by 1
move decimal
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