1.23
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Four and five hundredths (4.05) in standard form is 4.05 × 100
12.14 The whole-number part, 12, is the part left of the decimal point. The position first right of the decimal point is the tenths place; the position second right of the decimal point is the hundredths place. We can't write "14" in the single-column hundredths place. And in fact, 10 hundredths (10/100) is the same as one tenth (1/10), so we can write a "1" in the first position right of the decimal point to stand for the ten-hundredths portion of fourteen hundredths (10 of the 14 hundredths). And the remaining four hundredths (4/100) are indicated by the 4 in the hundredths place.
One and twenty three hundredths = 1.23 As a percentage, that is 123%
To write 123.5 as a mixed number, we first note that the whole number part is 123, and the decimal part is 0.5. To convert the decimal part to a fraction, we can see that 0.5 is equivalent to 1/2. Therefore, 123.5 can be written as the mixed number 123 1/2.
123