The name of a decimal is determined by the number of places to the right of the decimal point. Mixed decimals are numbers with both whole numbers and decimals. The name of a whole number is determined by the number of places to the left of the decimal point. The decimal point is most important part of a Decimal Number. Example: In the number 128.765, 1 is in the hundreds place, 2 is in the tens place, 8 is in the ones place, 7 is in the tenths place, 6 is in the hundredths place, and 5 is in the thousandths place.