Multiply 0.1 by 400 to get 40. This is how you find 10% of 400 without using proportion.
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100/62 is the appropriate proportion.
To find a percent.
Part = Base*Percent/100Proportion = Part/Base = (Base*Percent/100)*Base = Percent/100.
you set up a proportion and cross multiply then divide
to find percents using a proportion u first put the percent over 100 and put the whole number (number that you are tyring to find the percent of) over one. than you multiply those Example- 29 500 ___ times ____ 100 1 than you would multiply them