Jane used
27 of the ribbon to tie some presents. She threw away
37 of the remaining ribbon. As a result, she had 340 cm of the ribbon left. How much ribbon did Jane have at first? Give your answer in cm.
Fraction of the ribbon left after tying some presents
= 1 -
27=
57 Fraction of the remaining ribbon left after throwing away
= 1 -
37=
47
Fraction of the total ribbon left
=
57 ×
47=
2049
Length of the ribbon at first = 49 u
Length of the ribbon left = 20 u
20 u = 340
1 u = 340 ÷ 20 = 17
Length of the ribbon at first
= 49 u
= 49 x 17
= 833 cm
Answer(s): 833 cm