Datrys 0.0725(3*0.1725)+(3*0.0729)/9*0.1725+20*0.0725=

$$\frac { 0.0725 ( 3 \cdot 0.1725 ) + ( 3 \cdot 0.0729 ) } { 9 \cdot 0.1725 + 20 \cdot 0.0725 } =$$

Enrhifo

$$\frac{8199}{96080}\approx 0.085335137$$

Camau Ateb

Lluosi 0.0725 a 3 i gael 0.2175.

$$\frac{0.2175\times 0.1725+3\times 0.0729}{9\times 0.1725+20\times 0.0725}$$

Lluosi 0.2175 a 0.1725 i gael 0.03751875.

$$\frac{0.03751875+3\times 0.0729}{9\times 0.1725+20\times 0.0725}$$

Lluosi 3 a 0.0729 i gael 0.2187.

$$\frac{0.03751875+0.2187}{9\times 0.1725+20\times 0.0725}$$

Adio 0.03751875 a 0.2187 i gael 0.25621875.

$$\frac{0.25621875}{9\times 0.1725+20\times 0.0725}$$

Lluosi 9 a 0.1725 i gael 1.5525.

$$\frac{0.25621875}{1.5525+20\times 0.0725}$$

Lluosi 20 a 0.0725 i gael 1.45.

$$\frac{0.25621875}{1.5525+1.45}$$

Adio 1.5525 a 1.45 i gael 3.0025.

$$\frac{0.25621875}{3.0025}$$

Ehangu \frac{0.25621875}{3.0025} drwy luosi'r rhifiadur a'r enwadur gyda 100000000.

$$\frac{25621875}{300250000}$$

Lleihau'r ffracsiwn \frac{25621875}{300250000} i'r graddau lleiaf posib drwy dynnu a chanslo allan 3125.

$$\frac{8199}{96080}$$

Ffactor

$$\frac{911 \cdot 3 ^ {2}}{5 \cdot 1201 \cdot 2 ^ {4}} = 0.08533513738551207$$