document.write( "Question 333679: rewrite the fraction so that the numerator and denominator have the same units. then solve.
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Algebra.Com's Answer #239097 by jim_thompson5910(35256)\"\" \"About 
You can put this solution on YOUR website!
Since 1 minute = 60 seconds, this means that 7 minutes = 420 seconds (multiply both sides by 7)\r
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\n" ); document.write( "\n" ); document.write( "So 7mins/400sec = 420 sec/400 sec = 21/20
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