Question

what this sign refer to

Answer 1

its an equal to sign

Answer 2

One day earning of 5 men = Rs 525
One day earning of 1 man = Rs 525/5 = Rs 105
One day earning of 10 men = Rs 105 x 10 = Rs 1050
One day earning of 7 woman = Rs 525
One day earning of 1 woman = 525/7 = Rs 75
One day earning of 13 woman = 75 x 13 = Rs 975
One day earning of 10 men and 7 woman = Rs 1050 + Rs 975
                                                                   = Rs 2025.

hope this helps you