Question

Mr Tan earns $4200 per month. His wife earns 6/7 as much as Mr. Tan. Mr. Tan saves 1/5 of his salary and Mrs. Tan saves 1/8 of her salary. How much do they save together per month?
Mr Tan earns 4200
Mrs Tan earns 6/7 * 4200 = 3600

Mr Tan saves 1/5 * 4200 = 840
Mrs Tan saves 1/8 * 3600 = 450

add 'em up to get 1290
1260

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