A Philips's answer to Nidia's Primary 6 Maths Measurement Singapore question.

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A Philips
A Philips's answer
864 answers (A Helpful Person)
100-30 = 70%
70%= 420
1% = 420➗70
= 6 crystals
30% = 30 x 6
= 180 ( given to Ally)
300-180= 120 at first