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Tohaina

\frac{0.21}{0.3}=m
Whakawehea ngā taha e rua ki te 0.3.
\frac{21}{30}=m
Whakarohaina te \frac{0.21}{0.3} mā te whakarea i te taurunga me te tauraro ki te 100.
\frac{7}{10}=m
Whakahekea te hautanga \frac{21}{30} ki ōna wāhi pāpaku rawa mā te tango me te whakakore i te 3.
m=\frac{7}{10}
Whakawhitihia ngā taha kia puta ki te taha mauī ngā kīanga tau taurangi katoa.