Xuan used
27 of the ribbon to tie some presents. She threw away
47 of the remaining ribbon. As a result, she had 300 cm of the ribbon left. How much ribbon did Xuan 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 -
47=
37
Fraction of the total ribbon left
=
57 ×
37=
1549
Length of the ribbon at first = 49 u
Length of the ribbon left = 15 u
15 u = 300
1 u = 300 ÷ 15 = 20
Length of the ribbon at first
= 49 u
= 49 x 20
= 980 cm
Answer(s): 980 cm