Mrs. Falwell is 5 ft 4 in. and weighs 110 lb. During the interview, she mentions she has lost "a lot of weight" over the past 5 months. She usually weighs 135 lbs. What is her %UBW?

Question

Quizplus · Accepted Answer

First, we need to calculate Mrs. Falwell's usual body weight (UBW):

UBW = 100/(100-%IBW) x IBW

where IBW (Ideal Body Weight) can be calculated as:

IBW (women) = 100 lb + 5 lb for each inch over 5 feet
IBW (women) = 100 lb + 5(4) lb = 120 lb

Using her usual weight of 135 lb:

UBW = 100/(100-%IBW) x IBW
135 = 100/(100-%IBW) x 120
1.125(100-%IBW) = 100
%IBW = 11.1%
(we round this to 11%)

Now, we need to calculate her %UBW using her current weight of 110 lb:

%UBW = (current weight / UBW) x 100
%UBW = (110 / 120) x 100
%UBW = 91.7%
(we round this to 92%)

To calculate the percent weight change:

% weight change = ((usual weight - current weight) / usual weight) x 100
% weight change = ((135 - 110) / 135) x 100
% weight change = 18.5%

Therefore, Mrs. Falwell has lost 18.5% of her usual body weight, which is significant. However, her %UBW is not as low as 25% or as high as 120% or 123%, so the best choice is B: 81.

Mrs Falwell Is 5 Ft 4 In and Weighs