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Asked: how many people were absent
given: 1/5 of 40 people
operations: multiplication and division
numbers: 1/5 and 40
solution: multiply 1/5x40 = 40/5
           : divide 40/5=8
answer: 8 people were absent

Good:-) "N" in AGONSA is for "number sentence" or equation. 1/5 x 40 = N.