Find the reduction ratio of 6 / 7 square meters to 1.25 square decimeters emergency

Find the reduction ratio of 6 / 7 square meters to 1.25 square decimeters emergency

6 / 7 square meter: 1.25 square decimeter = 6 / 7 × 100:1.25 = 600 / 7:1.25 = 600:8.75 = 480:7;

1 square meter: 450 square decimeter reduction ratio

1 square meter = 100 square decimeter
100∶450＝2∶9

Simplification ratio (1) 1 / 4 hour: 15 minutes = () (2) 1.2km: 900m = () (3) 4.5m2: 70m2=

(1) 1 / 4: 15 = 15:15 = (1:1)
(2) 1.2km: 900m = 1200:900 = (4:3)
(3) 4.5 square meters: 70 square decimeters = 4.5:0.7 = 45:7

By calculation, one percent plus two percent plus three percent, how much more can we add to ninety-nine percent?
1 / 100 + 2 / 100 + 3 / 100... 99 / 100 is wrong.

One percent plus two percent plus three percent = six percent
It's going to take 93 percent to get to 99 percent
Make peace, right?
（1/100）+2/100+3/100+…… +99/100
=（1+2+3+4+…… +99）/100
=【（1+99）*49+50】/100
=49.5

One percent, plus two percent, plus three percent. What's up to 99 percent?

The original formula = (1 + 2 + 3 +...) +99）%
=（50*99）%
=4950%
=49.5

One and one hundred percent plus two and one hundred percent plus three and one hundred percent up to ninety-nine and ninety-nine percent

Is this the topic
1(1/100)+2(1/100)+3(1/100)+...+99(1/100)
Yes, it is
1(1/100)+2(1/100)+3(1/100)+...+99(1/100)
=1/100(1+2+3+..+99)
=1/100[((1+99)*99)/2]
=49.5
No, please explain

(one minus one hundredth) multiplied by (one minus ninety-nine one hundredth) multiplied by (...) How much is one minus one third

The original formula = (99 / 100) (98 / 99) (97 / 98). (2 / 3)
=2/100
=1/50

(1 / 2 minus 1 / 3) + (1 / 3 minus 1 / 4) + (1 / 4 minus 1 / 5) ++（

(1 / 2 minus 1 / 3) + (1 / 3 minus 1 / 4) + (1 / 4 minus 1 / 5) +. + (1 / N - (n + 1) 1 / N)
=1 / 2 - (n + 1) 1 / 2

(one third plus one fourth) divided by (one half minus one third)
75% by {(100% minus three fifths) by 25%}
Simple calculation

(1/3+1/4)÷(1/2-1/3)
=7/12÷1/6
=7/2
75%×(100%-3/5)×25%
=3/4×(1-3/5)×1/4
=3/4×2/5×1/4
=3/40

1. 7 / 10 + X + 1 / 2 = 15 / 82, 4 / 5 - x + 1 / 3 = 5 / 6

1,7 of 10 + X + 1 of 2 = 1510 of 8 (7 + 5) + x = 155 of 8 (6 + x = 15x of 8 = 15 of 8 - 6x of 5 = 40 (75-48) x = 272 of 40,4 of 5-x + 1 of 3 = 515 of 6 (12 + 5) - x = 515 of 6 (17-x = 5x of 6 = 5x of 15 (17-6) = 5x of 30 (34-25) x = 30