What is the percent of change of : 75 people to 25 people?
and how did you find the

You simple subtract 75-25=50 after that you use the base which is 75 people so it will be= 50/75 if you put this as a decimal 50/75=0.6666666(it goes on) you have to remember you need to multiply it by x100 with that you get 66.6 if you need to round it will be 66.7 (by tenth) by whole 7.

the law of definite proportions states samples of a compound will always contain the same proportion of elements by mass. in other words, a given compound will always contain the same elements in the same proportions by mass.the law of multiple proportions states when two elements combine with each other to form more than one compound, then the weights of one element that combine with a fixed weight of the other are in a ratio of small whole numbers.

X= 49; x = 4step 1: foilstep 2: equal both to 0step 3: find x individually