Question 333679
rewrite the fraction so that the numerator and denominator have the same units. then solve.
simplify:7mins/400sec
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convert to seconds:
[7min/400sec][60 sec/1 min]
=
[420 sec/400 sec]
==============================
OR
convert to minutes:
[7 min/400sec][60 sec/1 min]
[7 min/1 min][60 sec/400 sec
= (3/20)[7 min/1 min]
---
= [21 min/20 min]
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Cheers,
Stan H.