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## Question

primary 6 | Maths
| Ratio

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Hi help to show me the working

Thank you

So after the group of boys joined,

girls → 4 units, boys → 6 units

Total →10 units

Ratio of girls to boys = 4 : 6

Previously, ratio of girls to boys = 4 : 5

So since number of girls did not change,

Number of boys increased by 1 unit.

Percentage increase of boys = 1 unit / 5 units x 100%

= 1/5 x 100%

= 20%

Thank you very much

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