6)leslic's weight decreases from 80kg to 75kg find the percentage decrease in his weight
7)the rent of a flat is increased by 40% to become $12 180 this year find the rent last year
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2006-12-30 12:31 am
回答 (3)
2006-12-30 12:42 am
✔ 最佳答案
Decrease percentage = ( Weight decreased / Original weight ) x 100%
( 80 - 75 )/80 x 100%
= 5/80 x 100%
= 6.25%
New rent = Original rent x ( 1+ increase percentage )
Original rent = New rent ÷ ( 1 + 40% )
= $12 180 ÷ ( 1 + 40% )
= $12 180 ÷ 140%
= $12 180 x 100/140
= $8 700
2006-12-30 12:41 am
(6)80-75/80x100%
=5/80x100%
=1/16x100%
=6.25%
(7)12180/(1+40%)
=12180/140%
=$8700
=5/80x100%
=1/16x100%
=6.25%
(7)12180/(1+40%)
=12180/140%
=$8700
2006-12-30 12:41 am
6.
(75 - 80) / 80
= -6.25% (decreased)
7.
12180 / (1 + 0.4)
= $8700
(75 - 80) / 80
= -6.25% (decreased)
7.
12180 / (1 + 0.4)
= $8700
收錄日期: 2021-04-12 23:10:20
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https://hk.answers.yahoo.com/question/index?qid=20061229000051KK01828