Answer: 0.5
Step-by-step explanation:
Let the number be x , then
42% of x = 0.21
0.42x = 0.21
divide through by 0.42
x = 0.21/0.42
x = 0.5
Therefore : 42% of 0.5 = 0.21
Answer:
.5
.42/1 * x = .21
x = .21/.42
x = .5 or 1/2
