.02 =(......?.....)%

.025 = (25/1000) x 100% = 2.5%

8¹/₃% = (25/3 x 1/100) = 1/12

Let the required number be N.
Then, N - 20% of N = 40
? N - 20N/100 = 400
? 5N - N = 200
? N = 50

Let the required number be N.
Then, (16/100) x (40/100) x N = 8
Then, N = (8 x 100 x 100) / (16 x 40)
= 125

Number of men who can read and write = 150000 × (98 ÷ 100) =147000

Number of men and women who can read and write =294000 × (53 ÷ 100) =155820

Number of women who can read and write 155820 - 147000 = 8820

Thus, out of 144000 women 8820 can read and write.

Required percentage = (8820 × 100) ? 144000 %= 6.125

Let N% of 2/7 is 1/35
? (2/7 x N) / 100 = 1/35
? N = 1/35 x 7/2 x 100 = 10%

7.2 kg = 7.2 x 1000000 gm = 7200000 gms
Required percentage = (18/7200000) x 100 % = 0.25%

Let Y% of 130 = 10.4
⇒ (Y x 130) / 100 = 10.4
∴ Y = (10.4 x 100) / 130 = 8

2/5% = (2/5) /100 = 1/250

Let y% of 840 = 30% of 140
? (y/100) x 840 = (30/100) x 140
? y = (30 x 140 x 100) / (100 x 840 ) = 5