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Decompose angles

Toothy the crocodile wants to eat a delicious chicken. His mouth is open to an angle of 3030^\circ. He needs to open his mouth to an angle of 5555^\circ for the chicken to fit.
What is the measure of the additional angle Toothy's mouth needs to open so he can eat the chicken?
  • Your answer should be
  • an integer, like 66
  • an exact decimal, like 0.750.75
  • a simplified proper fraction, like 3/53/5
  • a simplified improper fraction, like 7/47/4
  • a mixed number, like 1 3/41\ 3/4
^\circ