Questione giuridica chiave
Whether the cantonal court violated Art. 285 CC by fixing child support on a percentage-of-income basis.
Decisione estratta
No violation: the abstract percentage method was permissible as long as support remained proportionate to the father's standard of living and capacity to pay.
Motivazione estratta
The law prescribes no mandatory calculation method; fixation lies within judicial discretion under equity. The court may use percentage benchmarks for average incomes if it considers all statutory criteria and preserves the debtor's reasonable relation between support and capacity.