Let's start by recalling that we can use the percent equation to solve problems that involve percent.
Percent Equation [0.3em]
part = percent * whole
In this case, we are asked to find 0.4 % of 82.1, which means that we want to find the part. Let p represent the part.
p = 0.4 % * 82.1
Before we can solve the equation that we got, we need to write the percent as a decimal. We can write a percent as a decimal by ignoring the percent symbol and moving the decimal point two places to the left.
We got that 0.4 % is equal to 0.004.
p = 0.4 % * 82.1 [0.3em] ↓ [0.3em]
p = 0.004 * 82.1
Finally, let's solve the equation for p.
