Whakaoti i te [(3.40-2.80):2.80]*100=

$$[ ( 3.40 - 2.80 ) : 2.80 ] \times 100 =$$

Aromātai

$$\frac{150}{7}\approx 21.428571429$$

Ngā Upane Otinga

Tangohia te 2.8 i te 3.4, ka 0.6.

$$\frac{0.6}{2.8}\times 100$$

Whakarohaina te \frac{0.6}{2.8} mā te whakarea i te taurunga me te tauraro ki te 10.

$$\frac{6}{28}\times 100$$

Whakahekea te hautanga \frac{6}{28} ki ōna wāhi pāpaku rawa mā te tango me te whakakore i te 2.

$$\frac{3}{14}\times 100$$

Tuhia te \frac{3}{14}\times 100 hei hautanga kotahi.

$$\frac{3\times 100}{14}$$

Whakareatia te 3 ki te 100, ka 300.

$$\frac{300}{14}$$

Whakahekea te hautanga \frac{300}{14} ki ōna wāhi pāpaku rawa mā te tango me te whakakore i te 2.

$$\frac{150}{7}$$

Tauwehe

$$\frac{2 \cdot 3 \cdot 5 ^ {2}}{7} = 21\frac{3}{7} = 21.428571428571427$$