Xandra used
34 of the ribbon to tie some presents. She threw away
310 of the remaining ribbon. As a result, she had 84 cm of the ribbon left. How much ribbon did Xandra have at first? Give your answer in cm.
Fraction of the ribbon left after tying some presents
= 1 -
34=
14 Fraction of the remaining ribbon left after throwing away
= 1 -
310=
710
Fraction of the total ribbon left
=
14 ×
710=
740
Length of the ribbon at first = 40 u
Length of the ribbon left = 7 u
7 u = 84
1 u = 84 ÷ 7 = 12
Length of the ribbon at first
= 40 u
= 40 x 12
= 480 cm
Answer(s): 480 cm