1% equals 1 part per hundred, so it also equals 10 parts per thousand, 100 parts per ten thousand, 1000 parts per hundred thousand or 10000 parts per million
10,000/1,000,000 = 0.01 = 1% Even easier: -- To convert any number to percent, multiply it by 100. -- 10,000 times 100 = 1 million -- 1 million per 1 million = 1 percent