21% is the same as 0.21 (move the decimal point to the left two place values to make it a decimal).
Next, to make it a fraction, move the decimal to the right two place values, and place the number over 100
0.21 = 21/100
21/100 is your answer
hope this helps
Answer:
Average rate of car: x+3
Walking rate: x
The equation is
10/15 = x/x+3
So
x = 6
So
Average rate of car: 9 mph
Walking rate: 6 mph
Step-by-step explanation: