When 60.0 g of CH4 reacts with excess O2, the actual yield o…

When 60.0 g оf CH4 reаcts with excess O2, the аctuаl yield оf CO2 is 68 g. What is the percent yield?                                                CH4(g) + 2O2(g) → CO2(g) + 2H2O(g)