Question

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sam expected to get $100 for his birthday but he only got $45. what was the percent error

Answer 1

take the theoretical value, 100, and subtract it from the actual value, 45, take the absolute value, then divide by the theoretical value, 100, then multiply by 100 (because we want the answer as a percentage)

|x|=x
|-x|=x
this means, the absolute value of any number, is positive so

45-100=-55
|-55|=55

55/100=0.55
0.55x100=55
55% is your answer

Answer 2

Ty