Your optimal exercise heart rate for cardiovascular benefits is calculated as follows: Subtract your age from 220 and then find 80% of the difference.

Find the optimal heart rate for a 40-year-old and for a 10-year-old.

Rounded to the nearest whole number, the optimal rate for the 10-year-old is _____% greater than the optimal rate for a 40-year-old.

0.8(220 - 40) =

0.8(220 - 10) =

Take it from there.

To find the optimal exercise heart rate for a 40-year-old and a 10-year-old, we follow the calculation mentioned.

For a 40-year-old:
Step 1: Subtract the age (40) from 220:
220 - 40 = 180

Step 2: Multiply the result by 80% (or 0.8) to find 80% of the difference:
180 * 0.8 = 144

So, the optimal heart rate for a 40-year-old is 144 beats per minute.

Now, let's calculate the optimal heart rate for a 10-year-old:
Step 1: Subtract the age (10) from 220:
220 - 10 = 210

Step 2: Multiply the result by 80% (or 0.8) to find 80% of the difference:
210 * 0.8 = 168

Therefore, the optimal heart rate for a 10-year-old is 168 beats per minute.

To find the percentage difference, we can use the formula:
Percentage difference = (|New Value - Old Value| / Old Value) * 100

Using this formula, let's calculate the percentage difference in optimal heart rates:

Percentage difference = (|168 - 144| / 144) * 100
Percentage difference = (24 / 144) * 100
Percentage difference ≈ 16.67

Rounded to the nearest whole number, the optimal heart rate for a 10-year-old is approximately 17% greater than the optimal heart rate for a 40-year-old.