Let the percentage be x%,

then,

x% of 80 = 64
$\frac{x}{100} \times 80 = 64 \\ \frac{x}{10} \times 8 = 64 \\ \frac{x}{10} = \frac{64}{8} \\ x = 8 \times 10 = 80 \%$

He has ridden 80% of the total bike course.

!! Hope It Helps !!

6 0

3 years ago

Work out the volume of a cuboid <br> 10cm by 3cm by 2cm?

Firlakuza [10]

10 x 3 x 2 = the volume
10 x 3 = 30
30 x 2 = 60 cm^3
it is cm^3 because all of the numbers you have are in cm

8 0

4 years ago

What is the answer need it ASAP PLZ

Ronch [10]

108ft. 100% positive.

6 0

3 years ago

Read 2 more answers

4x - y = -4<br> 5x = 2y +1<br> how do I solve this using elimination?

julia-pushkina [17]

8x - 2y = -8
-5x + 2y = -1

3x = -9
x = -3

4 0

3 years ago

Read 2 more answers