Question

ratio of 340m/s : 1520m/s

Answer 1

340m/s : 1520m/s
= 340/1520
= 17/76
= 17 :76

Answer 2

(340 m/s) / (1520 m/s)
= (68 m/s) / (304 m/s) { Dividing by 5 }
= (17 m/s) / (76 m/s) { Dividing by 4 }
= 17 m/s : 76 m/s
HOPE IT HELPS YOU