A new custodian cleaned 3/5 of a class room in eight minutes. This was only 4/9 of what an experienced custodian could do. what part of a room could an experienced custodian clean in eight minutes?
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4/9 is represented by 3/5
9/9 = ?
=1/(4/9) * 3/5
=1 and 7/20
an experience custodian can clean 1 and 7/20 classrooms in 8 minutes
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