Percentage denoted by the sign '%' means into hundred. So a percentage is any number as multiplied by hundred.
Hence 0.1 would be 1% as:
0.1*100=1
OR
1/100=0.1
In our case 5/7 as a percentage would be:
5/7*100
Multiplying:
500/7
Or
71.42
So 5/7 is 71.42%
Hence 0.1 would be 1% as:
0.1*100=1
OR
1/100=0.1
In our case 5/7 as a percentage would be:
5/7*100
Multiplying:
500/7
Or
71.42
So 5/7 is 71.42%