Tīpoka ki ngā ihirangi matua
Whakaoti mō C
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Tautapa C
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Ngā Raru Ōrite mai i te Rapu Tukutuku

Tohaina

C=\frac{4}{5}
Whakahekea te hautanga \frac{80}{100} ki ōna wāhi pāpaku rawa mā te tango me te whakakore i te 20.