Abi used
311 of the ribbon to tie some presents. She threw away
67 of the remaining ribbon. As a result, she had 72 cm of the ribbon left. How much ribbon did Abi have at first? Give your answer in cm.
Fraction of the ribbon left after tying some presents
= 1 -
311=
811 Fraction of the remaining ribbon left after throwing away
= 1 -
67=
17
Fraction of the total ribbon left
=
811 ×
17=
877
Length of the ribbon at first = 77 u
Length of the ribbon left = 8 u
8 u = 72
1 u = 72 ÷ 8 = 9
Length of the ribbon at first
= 77 u
= 77 x 9
= 693 cm
Answer(s): 693 cm