Can a profitable infrastructure project still miss a debt payment?

Practise debt service coverage with a worked example and a short check.

Coverage tests cash available for debt service against scheduled interest and principal.

DSCR = cash available for debt service ÷ scheduled debt service
Compare cash available during the period with scheduled interest plus principal for the same period. ₹120 crore ÷ ₹100 crore = 1.20×.
₹120 crore available against ₹100 crore of principal and interest gives 1.20×.
Compare cash available during the period with scheduled interest plus principal for the same period. ₹120 crore ÷ ₹100 crore = 1.20×.

Available cash drops to ₹90 crore with ₹100 crore debt service. What is the ratio?