Evelyn has a ribbon 420cm long.She uses 216cm to decorate a present.what percentage of the ribbon is left?Express your answer correct to 1 decimal place

420 cm - 216 cm = 204 cm ribbon remaining.

% ribbon left = (204/420)*100 = ?

you don't know anything da s

To find the percentage of the ribbon that is left, we need to divide the length of the ribbon that is left by the total length of the ribbon and then multiply by 100.

The length of the ribbon that is left can be found by subtracting the length used to decorate the present from the total length of the ribbon:

420 cm - 216 cm = 204 cm

Now we can calculate the percentage:

(204 cm / 420 cm) * 100 = 48.6 %

Therefore, approximately 48.6% of the ribbon is left.

To find the percentage of the ribbon left, you need to divide the length of the remaining ribbon by the total length of the ribbon and then multiply by 100.

First, let's calculate the length of the remaining ribbon:
Total length of the ribbon: 420 cm
Length used to decorate the present: 216 cm
Length of the remaining ribbon = Total length - Length used = 420 cm - 216 cm = 204 cm

Now, let's calculate the percentage of the remaining ribbon:
Percentage = (Length of remaining ribbon / Total length) * 100
Percentage = (204 cm / 420 cm) * 100
Percentage ≈ 0.4857 * 100
Percentage ≈ 48.6

Therefore, approximately 48.6% of the ribbon is left.