The distance between city e and f is 678.35 miles and the distance between city f and g is 156.8 miles. what is the distance between city g and h if the total distance is 2,457 miles?

E to F = 678.35 miles
F to G = 156.8 miles
G to H = x
Total distance = 2,457 miles
E to G = 678.35 + 156.8 miles
E to G = 835.15
G to H = 2,457 - 835.15
G to H = 1621.85 miles

Distance between G to H = Total distance - distance between E and F - distance between F and G

2457 - 678.35 - 156.8 = 1621.85 miles