it means that 70% of what is in the air is oxegon
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example: say saturation level of sugar in water is 70 percent, if the solution is 70 percent sugar, it is saturated
70x0.7=49 so 70% of 70 is 49 70 percent in decimal form is .7 Multiply 70 by .7 to determine 70 percent of 70 = 49.
49 divided by 70% is 70. 49 is 70 percent of 70 students.
In means that prices have been reduced by 1%, 5%, 10% and in at least one case, 70%.
$63 dollars. 10 percent of 70 is 7. 70-7 is 63.