Nope, already simplified.
10%off 415 = 415 - (0.10 x 415) = 373.5
10% of 415 is 41.500
10 + 3 + 412 - 10 = 415
415/27 = 15.370370370..., or 15 10/27.
420
4.15 x 10^2
2 hours and 10 minutes.
It is 10 hours and 45 minutes.
415 has these factors: 1, 5, 83, 415.
420.
CDXV = 415