4/5 as a decimal

How to convert this fraction

Divide 4 by 5 using integer long division. The whole-number part is 0; the remaining fraction is 4/5.

1. Bring down a zero: remainder × 10 gives the next decimal digit 8; the new remainder is 0.

The remainder reaches zero after 1 decimal places, so 4/5 = 0.8 exactly.

Check: 0 × 5 + 4 = 4, so the quotient and remainder reconstruct the original fraction.