Without using a calculator, write
20.7 degrees in degrees, minutes, and seconds.
20.7 degrees is the same as 20
degrees plus seven-tenths or 0.7 of a degree. We also recall that one degree is
equal to 60 minutes. We know that the first part of our
answer will be 20 degrees. And we need to convert 0.7 degrees
into minutes or minutes and seconds. To convert 0.7 degrees into
minutes, we need to multiply it by 60. 0.7 multiplied by 60 is equal to
42. This is because 0.7 multiplied by
10 is seven, and multiplying this by six gives us 42. 0.7 degrees is, therefore, equal to
42 minutes. As this was an exact number of
minutes, we will have zero seconds. 20.7 degrees is, therefore, equal
to 20 degrees, 42 minutes, and zero seconds.