The discount was 25% off use 21/28 which is 75 percent of what it was before. 25 percent off.
Integers are irrational numbers. A natural number is a rational number. An irrational number is a real number. Zero is a natural number.
I hope this helps!
C = Wtc/1000
1000C = Wtc
Wtc = 1000C
W = (1000C) / (tc)
This is assuming that C and c are not the same.
If they are the same, we have:
W = (1000) / t, provided ,that C and c are not equal to 0.