Shiyun used
49 of the streamer to tie some presents. She threw away
59 of the remaining streamer. As a result, she had 240 cm of the streamer left. How much streamer did Shiyun have at first? Give your answer in cm.
Fraction of the streamer left after tying some presents
= 1 -
49=
59 Fraction of the remaining streamer left after throwing away
= 1 -
59=
49
Fraction of the total streamer left
=
59 ×
49=
2081
Length of the streamer at first = 81 u
Length of the streamer left = 20 u
20 u = 240
1 u = 240 ÷ 20 = 12
Length of the streamer at first
= 81 u
= 81 x 12
= 972 cm
Answer(s): 972 cm