Question

if an election a candidate got 65% of the total votes were declared invalid if the total number of votes cast was 600000 find the number of valid votes polled in favor of the candidate

Answer 1

total number of votes=6,00,000
65% of total votes are invalid

i. e. 65/100(600000)
390000 votes were invalid

so,number of valid votes =6,00,000-3,90,000
2,10,000

Answer 2

invalid votes percent = 65%
valid votes percent = 100% - 65% = 35%
total votes = 600000 

valid votes = 35/100 * 600000
                   = 210,000

I think this is the answer. Hope it helps you.