Question

In an examination a student could solve problems out of 20. What percent of problems were correctly solved by him?

Answer 1

First you convert

80

%

into a decimal which is

.80

then you multiply it by

20

.

.80

×

20

=

16

We multiply it by

20

because that's our total and by

.80

because that's the amount that we got correct. Had it been

100

%

then that would mean we got every question right.