**True**

**Consider the given ratio, 20g : 100g = 1metre : 500cm**

20/100 = 1/500

**We know that, 1 meter = 100 cm**

So, 20g: 100g = 100cm : 500 cm

20/100 = 100/500

20/100 is further simplified by dividing both numerator and denominator by 20 we get,

= 1/5

100/500 is further simplified by dividing both numerator and denominator by 100 we get,

= 1/5

Hence, 1/5 = 1/5

**Therefore, 20g : 100g = 1metre : 500cm**