To find out what 46 of 100 is, you can interpret this as working out 46% of 100. To calculate this, you can simply multiply 100 by 0.46 (which is the decimal form of 46%).
This gives you:
100 x 0.46 = 46
So, 46 of 100 is 46. This means that if you have 100 items, 46 of them represent 46% of the total.