एक अमीटर 4.5 A का पाठ्यांक दिखाता है जबकि परिपथ में प्रवाहित वास्तविक धारा 4.0 A है। मापन की सापेक्ष प्रतिशत त्रुटि (relative percentage error) क्या है?

A digital multimeter has a DC voltage range of 0-25 V with an accuracy specification of ±0.5% of the measured value. If it displays 16.00 V, calculate the maximum possible measurement error:

Suppose that 0.5 mg of a precipitate is lost as a result of being washed with 200 mL of wash liquid. If the precipitate weighs 500 mg, what is the relative error due to the solubility loss?