Abi used
18 of the thread to tie some presents. She threw away
411 of the remaining thread. As a result, she had 539 cm of the thread left. How much thread did Abi have at first? Give your answer in cm.
Fraction of the thread left after tying some presents
= 1 -
18=
78 Fraction of the remaining thread left after throwing away
= 1 -
411=
711
Fraction of the total thread left
=
78 ×
711=
4988
Length of the thread at first = 88 u
Length of the thread left = 49 u
49 u = 539
1 u = 539 ÷ 49 = 11
Length of the thread at first
= 88 u
= 88 x 11
= 968 cm
Answer(s): 968 cm