can someone help me solve this problem, A copper alloy contains 80% copper by weight . How much copper is in 2.00 kg of this alloy?

Question

amistre64 · Answer

well, we can find 1 percent simply by dividing by 100

80 of those percents is then just multiplying 1% by 80

amistre64 · Answer

if we have n amount of copper

n/100 = 1%,  therefore:  80n/100 = 80%

lexy148 · Answer

so would the answer be 1%

amistre64 · Answer

no, the answer would be 80%  which i demonstrated a reasonable way to approach it.

amistre64 · Answer

a general memorization is to move a decimal point:  80% = 80/100 = .80

but if you cant recall all the memorization that one must do to memorize tricks, then simply applying the math will do you well

lexy148 · Answer

so the answer would   be 80%

lexy148 · Answer

fot this problem

lexy148 · Answer

@Hero can you hep me out with this problem

hero · Answer

@lexy148, show your attempt to solve this using the formula I gave you.

hero · Answer

Feel free to use the "Draw" application to post your steps.

lexy148 · Answer

|dw:1410037352368:dw| like this @Hero