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The net profit margin ratio indicates profit levels of a
business after all costs have been taken into account.
It is worth analysing the ratio over time. A variation in the
ratio from year to year may be due to abnormal conditions or
expenses. Variations may also indicate cost blowouts which
need to be addressed.
A decline in the ratio over time may indicate a margin squeeze
suggesting that productivity improvements may need to be
initiated. In some cases, the costs of such improvements may
lead to a further drop in the ratio or even losses before
increased profitability is achieved.
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