To evaluate the expression \( 152.2 - 122 \div 4 \), follow the order of operations (PEMDAS/BODMAS):
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Division first: \[ 122 \div 4 = 30.5 \]
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Subtraction next: \[ 152.2 - 30.5 = 121.7 \]
Thus, the result of the expression \( 152.2 - 122 \div 4 \) is \( \boxed{121.7} \).