1. Comparison between 203 and 478 using place value
Unit digit of 203=3, Unit digit of 478 =8→ 8> 3
Ten's digit of 203=0, Ten's digit of 478 =7,→7>0
Hundred's digit of 203 =2, Hundred's digit of 478=4, → 4>2
As both of them are three digit number and hundred's place of 478 is greater than 203, ⇒478>203
2. Comparison between 204 and 210 using place value
Unit digit of 204=4, Unit digit of 210 =0→ 4> 0
Ten's digit of 204=0, Ten's digit of 210=1→1>0
Hundred's digit of 204 =2, Hundred's digit of 210=2, →2=2
Both of them are three digit number, hundred's place are same, but ten's digit of 210 is greater than 204 , So ⇒ 210> 204