Usha used
35 of the streamer to tie some presents. She threw away
310 of the remaining streamer. As a result, she had 21 cm of the streamer left. How much streamer did Usha have at first? Give your answer in cm.
Fraction of the streamer left after tying some presents
= 1 -
35=
25 Fraction of the remaining streamer left after throwing away
= 1 -
310=
710
Fraction of the total streamer left
=
25 ×
710=
725
Length of the streamer at first = 25 u
Length of the streamer left = 7 u
7 u = 21
1 u = 21 ÷ 7 = 3
Length of the streamer at first
= 25 u
= 25 x 3
= 75 cm
Answer(s): 75 cm