480/478 = ≈100.42%
Rounded to 2 decimal places.
A value like 480/478, or about 100.42%, can show up when a measurement is slightly higher than its original target. For example, a factory might produce 480 items instead of the planned 478, or a bill could end up a little above an estimate.
To picture it quickly, think of 100% as the whole amount and 100.42% as just barely more than the whole. The difference is so small that a bar representing it would look almost exactly full, with only a tiny extra section.
A common mistake is assuming that 100.42% means 0.42% because the numbers look similar. It actually means the full 100% plus an additional 0.42%, so the amount is slightly greater than the original reference value.