The sum of 431 plus 478 is 909. This is because when adding two numbers together, you combine the digits in each place value (ones, tens, hundreds, etc.). In this case, 1 + 8 equals 9 in the ones place, 3 + 7 equals 10 (carry-over 1 to the tens place), and 4 + 4 equals 8 in the hundreds place.
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0.24 + 431 + 9.4 + 508 = 948.64
478 = 478
15% of 478= 15% * 478= 0.15 * 478= 71.7
To convert 478 to percent multiply by 100. Thus, 478 × 100 = 47,800%
1 x 431, 431 x 1