What number is bigger 0.402 or 0.42?

To compare the numbers 0.402 and 0.42, we can look at their decimal representations. In this case, 0.42 is bigger than 0.402 because the digit in the tenths place is greater in 0.42 (4) compared to 0.402 (0). When comparing decimals, we start from the left and move to the right until we find a point of difference.