곱연산 계산

곱연산이 헷갈려서 만들었다.

calc([50, 30, 20]);

function calc(persents){
	let value = 1;
	let calcPersent = 1;

	for(persent of persents){
		calcPersent *= (1-(persent/100));
	}
	value -= calcPersent;
	return value*100 + " %";
}

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