A worked example
10 m spool, 120 cm pieces and 5 cm waste per piece give 8 pieces with no remainder.
Count equal pieces from a spool with a per-piece cutting allowance.
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Pieces = floor(spool metres × 100 ÷ (piece cm + waste cm)).
10 m spool, 120 cm pieces and 5 cm waste per piece give 8 pieces with no remainder.
Identical cuts; leftover is not a usable extra piece unless it meets the full cut requirement.
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