Part (a):
Turn percentage into a decimal.
26.8% = 0.268
Multiply.
67.5 * 0.268 = 18.09 (Answer)
Part (b):
Divide.
89.87 / 215 = 0.418
Turn into a whole number.
0.418 = 41.8 (Answer)
Turn percentage to a decimal to check.
215% = 2.15
Multiply
41.8 * 2.15 = 89.87
Hope This Helped! Good Luck!