There are 6,657 marbles in a jar. approximately 34% are white, and the rest are black. how many black marbles are there?

So if there are 34% white marbles, that means that 66% are black (100% - 34% = 66%). 

If 100% = 1.00, then 66% = 0.66.

Now, you just need to multiply the total by this decimal in order to find the number of black marbles:

6657 x 0.66 = 4393.62, which can be rounded to 4394

Therefore, there are about 4394 black marbles in the jar. 

I hope this helps!

One shot. if 60% of 10 is 6, then what is 70%? we know it would be seven (since 60% is mathematically 60/100, or 6/10, then 70% is 70/100, or 7/10) but we can check anyway using ratios: 6 : 60% = x : 70%*inverse multiplicationx * 60% = 6 * 70%*divide both sides by 60%x = (6 * 70%) / 60%x = 7and since he has made 6 shots already, he would need just one more to get 7 shots or 70%. if the explanation is too confusing, comment and i will try to