Brock is painting two walls that are the same size. he already has painted #1/4# of one wall and #4/12# of the other wall. How much area does Brock still need to paint?

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Answer 1 · 2018-08-13T20:55:52

#1 5/12# walls are left to paint.

If #1/4# has been painted, then there is #3/4# of the first wall left.

#4/12 = 1/3#

If #1/3# of the second wall is painted, then #2/3# is left.

Each wall can be regarded as #1# full wall. In total there are #2# full walls to paint.

#3/4+2/3# are left of the two walls

#(9+8)/12 = 17/12#

#17/12 = 1 5/12# walls are left to paint.