Question

the weight of a plastic was 3.75 gram before eating and 3.50 gram after heating what is the loss percent (% decrease)​

Answer 1

weigh before heating = 3.75 g

weight after heating= 3.50 g

decrease=3.75-3.50=0.25

$\% = 0.25 \div 3.75 \times 100 \\ \% = 25 \div 375 \times 100 \\ \% = 6.\%$

Answer 2

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Total weight =3.75

After heating ,

weight =3.50

3.75-3.50=0.25

0.25/3.75×100=6.23

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