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## Question

primary 6 | Maths
| Fractions

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So 100% → 180%

180% → $630

1% → $630 ÷ 180 = $3.50

100% → $3.50 x 100 = $350

Brian decreased his savings by 50%

So 100% → 50%

50% → $630

So 100% → $630 x 2 = $1260

Notice that when Calvin gave David 1/5 of his savings, their total amount of $ stays unchanged. so their total is $630 x 2 = $1260

Total savings the four children had at first

= $1260 + $1260 + $350

=$2870

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