Chapter 8. Percentage and Its Applications
Optional Questions and Answers for Algebraic Expressions and Polynomials [1 Mark]
CHECK YOUR PROGRESS 3.1
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Long Questions and Answers for Algebraic Expressions and Polynomials [ 3 or 4 Mark]
CHECK YOUR PROGRESS 8.1
1. Convert each of the following fractions into a percent:
(a) 12/25 (b) 9/20 (c) 5/12 (d) 6/15 (e) 125/625 (f) 3/10 (g) 108/300 (h) 189/150 (i) 72/25 (j) 1231/1250
Solution: (a)
1225=1225×100%=12×4=48 %
(b)
920=920×100%=9×5=45%
(c)
512=512×100%=53×25=1253=4123%
(d)
615=615×100%=25×100=2×20=40%
(e)
125625=15×100%=20%
(f)
310=310×100%=3×10=30%
(g)
108300=36100×100%=36%
(h)
189150=6350×100%=63×2=126%
(i)
7225=7225×100%=72×4=288%
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