uythis we can write as:
x=0.4%*82.1
and now we count:)
I like to change my percent into fractions:
x=

ill multiply the fraction by 10 on nominatoer and denominator:
x=

x=

calculate the mupliplication:
x=

and write as a decimal fraction:
x=0.3284 (you move the point by as many places as there are 0s in the denominatorr)
this is the resul!