Rounded to three significant figures, 365/687 = 0.531
1.8822
mars age = earth age* 365 / 687 Mars age= 12*365/687 Mars age = 6.37 Mars years
0.1528
8.4884
365
76.3333
273
343.5
36.5
Taking into account that the planet Mars orbits our Sun in about 687 days, while the Earth does the same in about 365 days, it comes down to simple math: 365 * 12 / 687 = 6,38 years.
60.8333
27.3973