Increase 30g by 10%
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30 + 10% × 30 =
(1 + 10%) × 30 =
(100% + 10%) × 30 =
110% × 30 =
110 ÷ 100 × 30 =
110 × 30 ÷ 100 =
3,300 ÷ 100 =
33
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