It is: 378
400
To the nearest ten, 380 To the nearest hundred, 400
380
0
Given the choice, it is easier to find 378: it is the successor to the whole number 377.
278
To the nearest ten, 380
378
400
All the multiples of 378, which are infinite: 378, 756, 1134, 1512 +378 . . .
Rounded to two decimal places, 378/421 x 100 = 89.79 percent.