Whakaoti i te 0.2:27/25-2/3=

$$0.2 : \frac { 27 } { 25 } - \frac { 2 } { 3 } =$$

Aromātai

$$-\frac{13}{27}\approx -0.481481481$$

Ngā Upane Otinga

Whakawehe 0.2 ki te \frac{27}{25} mā te whakarea 0.2 ki te tau huripoki o \frac{27}{25}.

$$0.2\times \frac{25}{27}-\frac{2}{3}$$

Me tahuri ki tau ā-ira 0.2 ki te hautau \frac{2}{10}. Whakahekea te hautanga \frac{2}{10} ki ōna wāhi pāpaku rawa mā te tango me te whakakore i te 2.

$$\frac{1}{5}\times \frac{25}{27}-\frac{2}{3}$$

Me whakarea te \frac{1}{5} ki te \frac{25}{27} mā te whakarea taurunga ki te taurunga me te tauraro ki te tauraro.

$$\frac{1\times 25}{5\times 27}-\frac{2}{3}$$

Mahia ngā whakarea i roto i te hautanga \frac{1\times 25}{5\times 27}.

$$\frac{25}{135}-\frac{2}{3}$$

Whakahekea te hautanga \frac{25}{135} ki ōna wāhi pāpaku rawa mā te tango me te whakakore i te 5.

$$\frac{5}{27}-\frac{2}{3}$$

Ko te maha noa iti rawa atu o 27 me 3 ko 27. Me tahuri \frac{5}{27} me \frac{2}{3} ki te hautau me te tautūnga 27.

$$\frac{5}{27}-\frac{18}{27}$$

Tā te mea he rite te tauraro o \frac{5}{27} me \frac{18}{27}, me tango rāua mā te tango i ō raua taurunga.

$$\frac{5-18}{27}$$

Tangohia te 18 i te 5, ka -13.

$$-\frac{13}{27}$$

Tauwehe

$$-\frac{13}{27} = -0.48148148148148145$$