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QUESTION
If 1 inch is 2.54 cm, how many cm are there in 12 inches?
##12 xx2.54 = 30.48cm##
If ## 1 " inch" = 2.54 cm, "then 12 inches" = 12 xx 2.54 cm##
=##12xx2.54 = 30.48 cm##
Or use direct proportion to compare cm to inches.
##1/2.54 = 12/x##
## x = 12 xx2.54 = 30.48cm##
