3 h 45 min − 1.69 h na montre

Mpo na nini $\displaystyle 2\,\text{h}\,3\,\text{min}\,36\,\text{s}$? 1 virgule 69 heures ezali 1 heure, 41 minutes mpe 24 secondes: $\displaystyle 0.69 \times 60 = 41.4\,\text{min}$, mpe $\displaystyle 0.4 \times 60 = 24\,\text{s}$. Bozongisa montre na sima na ntango wana banda $\displaystyle 3{:}45$, mpe emonisaka $\displaystyle 2{:}03{:}36$.