Ɓeydude pursantaas: ñawndugol

Ɓeydu ñawndugol $\displaystyle 25\%$ e coggu 500, ko adii fof hono no men waɗirta e pen e papye. $\displaystyle 25\%$ e $\displaystyle 500$ ko honɗum? Tappu 500, dobo , tappu 25, refti e : 125.. Ɗum ko ñawndugol ngol. Ɓeydu ɗum e coggu ngu: tappu 500, dobo , tappu 125, e dobo . Coggu ngu e ñawndugol ko 625..