Error printing model accuracy

[jcplu]

313/313 [==============================] - 3s 8ms/step - loss: 1.3655 - accuracy: 0.5196

Traceback (most recent call last):
File "C:\Users\xxxxx\Documents\Python\CNN\cnn.py", line 54, in
print("Accuracy: &2.f%%" %(model.evaluate(X_test, y_test)[1]*100))
TypeError: not all arguments converted during string formatting