Yen used
19 of the thread to tie some presents. She threw away
57 of the remaining thread. As a result, she had 224 cm of the thread left. How much thread did Yen have at first? Give your answer in cm.
Fraction of the thread left after tying some presents
= 1 -
19=
89 Fraction of the remaining thread left after throwing away
= 1 -
57=
27
Fraction of the total thread left
=
89 ×
27=
1663
Length of the thread at first = 63 u
Length of the thread left = 16 u
16 u = 224
1 u = 224 ÷ 16 = 14
Length of the thread at first
= 63 u
= 63 x 14
= 882 cm
Answer(s): 882 cm