Datrys 30/210:35/210:42/210

$$\frac { 30 } { 210 } : \frac { 35 } { 210 } : \frac { 42 } { 210 }$$

Enrhifo

$$\frac{30}{7}\approx 4.285714286$$

Camau Ateb

Rhannwch \frac{\frac{30}{210}}{\frac{35}{210}} â \frac{42}{210} drwy luosi \frac{\frac{30}{210}}{\frac{35}{210}} â chilydd \frac{42}{210}.

$$\frac{\frac{30}{210}\times 210}{\frac{35}{210}\times 42}$$

Lleihau'r ffracsiwn \frac{30}{210} i'r graddau lleiaf posib drwy dynnu a chanslo allan 30.

$$\frac{\frac{1}{7}\times 210}{\frac{35}{210}\times 42}$$

Lluosi \frac{1}{7} a 210 i gael \frac{210}{7}.

$$\frac{\frac{210}{7}}{\frac{35}{210}\times 42}$$

Rhannu 210 â 7 i gael 30.

$$\frac{30}{\frac{35}{210}\times 42}$$

Lleihau'r ffracsiwn \frac{35}{210} i'r graddau lleiaf posib drwy dynnu a chanslo allan 35.

$$\frac{30}{\frac{1}{6}\times 42}$$

Lluosi \frac{1}{6} a 42 i gael \frac{42}{6}.

$$\frac{30}{\frac{42}{6}}$$

Rhannu 42 â 6 i gael 7.

$$\frac{30}{7}$$

Ffactor

$$\frac{2 \cdot 3 \cdot 5}{7} = 4\frac{2}{7} = 4.285714285714286$$