Painting classrooms

Martha solicited 3 2/3 liters of paint for the brigade. Their city mayor gave their school another 2 2/5 liters of paint. If each classroom needs 1 3/7 liters, how many classrooms can be painted?

Correct answer:

n =  4

Step-by-step explanation:

M=323=3+23=3 3+23=1133.6667 l A=225=2+25=2 5+25=125=2.4 l  c=137=1+37=1 7+37=1071.4286 l  V=M+A=3.6667+2.4=9115=61156.0667 l  n1=V/c=6.0667/1.4286=637150=4371504.2467  n=n1=4.2467=4

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