Operating profit plummeted 84.7% to $40.5 million.
Group said balance sheet 'remains strong'.
The holding company turns in performance significantly worse than that of Publicis Groupe, as operating profit plummets 89% to $62.5 million.
On his first day, Main speaks of 'seismic change' in a memo to staff.
Arthur Sadoun, chairman and chief executive, said that the business has 'strong fundamentals to weather the crisis'.
The agency employs more than 1,500 staff across eight offices.
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