Calculate the percentage of marks scored by the people below.
I) Abimanyu scored 399 marks out of 500 in SSLC examination.
The percentage of Abimanyu's marks \(=\) \(\%\).
II) Prisha scored 831 marks out of 1200 in HSC examination.
The percentage of Prisha's marks \(=\) \(\%\).
[Note: Submit the answer in a maximum of a single decimal. If it is a whole number mention as it is.]