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(C) Given the relation $x = a - b$.The absolute error in $x$,denoted by $\Delta x$,is given by the sum of the absolute errors in $a$ and $b$ because e

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$\left( \frac{\Delta a}{a-b} + \frac{\Delta b}{a-b} ight) 	imes 100\%$

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(C) Given the relation $x = a - b$.The absolute error in $x$,denoted by $\Delta x$,is given by the sum of the absolute errors in $a$ and $b$ because errors always add up in subtraction as well.Therefore,$\Delta x = \Delta a + \Delta b$.The percentage error is defined as $\frac{\Delta x}{x} 	imes 100\%$.Substituting the values of $\Delta x$ and $x$,we get:Percentage error $= \left( \frac{\Delta a + \Delta b}{a - b} ight) 	imes 100\% = \left( \frac{\Delta a}{a - b} + \frac{\Delta b}{a - b} ight) 	imes 100\%$.

If $x = a - b$,then the percentage error in $x$ will be

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